first version semicomplete
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\ProvidesClass{arbeit}
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\LoadClass[a4paper, titlepage]{article}
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\RequirePackage[utf8]{inputenc}
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\RequirePackage[T1]{fontenc}
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\RequirePackage{textcomp}
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\RequirePackage[german]{babel}
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\RequirePackage{amsmath, amssymb, amsthm}
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\RequirePackage{mdframed}
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\RequirePackage{fancyhdr}
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\RequirePackage{geometry}
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\RequirePackage{import}
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\RequirePackage{pdfpages}
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\RequirePackage{transparent}
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\RequirePackage{xcolor}
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\RequirePackage{array}
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\RequirePackage[shortlabels]{enumitem}
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\RequirePackage{tikz}
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\RequirePackage{pgfplots}
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\RequirePackage[nobottomtitles]{titlesec}
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\RequirePackage{listings}
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\RequirePackage{mathtools}
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\RequirePackage{forloop}
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\RequirePackage{totcount}
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\RequirePackage{calc}
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\RequirePackage{wasysym}
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\RequirePackage{environ}
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\usetikzlibrary{quotes, angles}
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\pgfplotsset{
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compat=1.15,
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default 2d plot/.style={%
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grid=both,
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minor tick num=4,
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grid style={line width=.1pt, draw=gray!10},
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major grid style={line width=.2pt,draw=gray!50},
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axis lines=middle,
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enlargelimits={abs=0.2}
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},
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}
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% PAGE GEOMETRY
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\geometry{
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bottom=35mm
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}
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% PARAGRAPH no indent but skip
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\setlength{\parskip}{3mm}
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\setlength{\parindent}{0mm}
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\newtheorem{satz}{Satz}[section]
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\newtheorem{lemma}[satz]{Lemma}
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\newtheorem{korollar}[satz]{Korollar}
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\theoremstyle{definition}
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\newtheorem{definition}[satz]{Definition}
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%\theoremstyle{definition}
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%\newmdtheoremenv{satz}{Satz}[section]
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%\newmdtheoremenv{lemma}[satz]{Lemma}
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%\newmdtheoremenv{korollar}[satz]{Korollar}
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%\newmdtheoremenv{definition}[satz]{Definition}
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\newtheorem{bsp}[satz]{Beispiel}
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\newtheorem{bem}[satz]{Bemerkung}
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\newtheorem{aufgabe}{Aufgabe}
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% enable aufgaben counting
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\regtotcounter{aufgabe}
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% temporary calculation counter
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\newcounter{var}
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\newcommand{\N}{\mathbb{N}}
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\newcommand{\R}{\mathbb{R}}
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\newcommand{\Z}{\mathbb{Z}}
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\newcommand{\Q}{\mathbb{Q}}
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\newcommand{\C}{\mathbb{C}}
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% HEADERS
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\pagestyle{fancy}
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\newcommand{\incfig}[1]{%
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\def\svgwidth{\columnwidth}
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\import{./figures/}{#1.pdf_tex}
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}
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\pdfsuppresswarningpagegroup=1
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% code listings, define style
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\lstdefinestyle{mystyle}{
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commentstyle=\color{gray},
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keywordstyle=\color{blue},
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numberstyle=\tiny\color{gray},
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stringstyle=\color{black},
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basicstyle=\ttfamily\footnotesize,
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breakatwhitespace=false,
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breaklines=true,
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captionpos=b,
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keepspaces=true,
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numbers=left,
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numbersep=5pt,
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showspaces=false,
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showstringspaces=false,
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showtabs=false,
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tabsize=2
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}
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% activate my colour style
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\lstset{style=mystyle}
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% better stackrel
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\let\oldstackrel\stackrel
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\renewcommand{\stackrel}[2]{%
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\oldstackrel{\mathclap{#1}}{#2}
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}%
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% integral d sign
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\makeatletter \renewcommand\d[2][]{\ensuremath{%
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\,\mathrm{d}^{#1}#2\@ifnextchar^{}{\@ifnextchar\d{}{\,}}}}
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\makeatother
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% contradiction
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\newcommand{\contr}{\text{\Large\lightning}}
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% disjoint unions: provides cupdot and bigcupdot
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\makeatletter
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\def\moverlay{\mathpalette\mov@rlay}
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\def\mov@rlay#1#2{\leavevmode\vtop{%
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\baselineskip\z@skip \lineskiplimit-\maxdimen
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\ialign{\hfil$\m@th#1##$\hfil\cr#2\crcr}}}
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\newcommand{\charfusion}[3][\mathord]{
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#1{\ifx#1\mathop\vphantom{#2}\fi
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\mathpalette\mov@rlay{#2\cr#3}
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}
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\ifx#1\mathop\expandafter\displaylimits\fi}
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\makeatother
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\newcommand{\cupdot}{\charfusion[\mathbin]{\cup}{\cdot}}
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\newcommand{\bigcupdot}{\charfusion[\mathop]{\bigcup}{\cdot}}
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\ExplSyntaxOn
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% S-tackrelcompatible ALIGN environment
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% some might also call it the S-uper ALIGN environment
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% uses regular expressions to calculate the widest stackrel
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% to put additional padding on both sides of relation symbols
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\NewEnviron{salign}
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{
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\begin{align}
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\lec_insert_padding:V \BODY
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\end{align}
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}
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% starred version that does no equation numbering
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\NewEnviron{salign*}
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{
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\begin{align*}
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\lec_insert_padding:V \BODY
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\end{align*}
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}
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% some helper variables
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\tl_new:N \l__lec_text_tl
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\seq_new:N \l_lec_stackrels_seq
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\int_new:N \l_stackrel_count_int
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\int_new:N \l_idx_int
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\box_new:N \l_tmp_box
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\dim_new:N \l_tmp_dim_a
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\dim_new:N \l_tmp_dim_b
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\dim_new:N \l_tmp_dim_needed
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% function to insert padding according to widest stackrel
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\cs_new_protected:Nn \lec_insert_padding:n
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{
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\tl_set:Nn \l__lec_text_tl { #1 }
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% get all stackrels in this align environment
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\regex_extract_all:nnN { \c{stackrel}{(.*?)}{(.*?)} } { #1 } \l_lec_stackrels_seq
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% get number of stackrels
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\int_set:Nn \l_stackrel_count_int { \seq_count:N \l_lec_stackrels_seq }
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\int_set:Nn \l_idx_int { 1 }
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\dim_set:Nn \l_tmp_dim_needed { 0pt }
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% iterate over stackrels
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\int_while_do:nn { \l_idx_int <= \l_stackrel_count_int }
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{
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% calculate width of text
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\hbox_set:Nn \l_tmp_box {$\seq_item:Nn \l_lec_stackrels_seq { \l_idx_int + 1 }$}
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\dim_set:Nn \l_tmp_dim_a {\box_wd:N \l_tmp_box}
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% calculate width of relation symbol
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\hbox_set:Nn \l_tmp_box {$\seq_item:Nn \l_lec_stackrels_seq { \l_idx_int + 2 }$}
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\dim_set:Nn \l_tmp_dim_b {\box_wd:N \l_tmp_box}
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% check if 0.5*(a-b) > minimum padding, if yes updated minimum padding
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\dim_compare:nNnTF
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{ 1pt * \dim_ratio:nn { \l_tmp_dim_a - \l_tmp_dim_b } { 2pt } } > { \l_tmp_dim_needed }
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{ \dim_set:Nn \l_tmp_dim_needed { 1pt * \dim_ratio:nn { \l_tmp_dim_a - \l_tmp_dim_b } { 2pt } } }
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{ }
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\quad
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% increment list index by three, as every stackrel produces three list entries
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\int_incr:N \l_idx_int
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\int_incr:N \l_idx_int
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\int_incr:N \l_idx_int
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}
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% replace all relations with align characters (&) and add the needed padding
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\regex_replace_all:nnN
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{ (<&|&<|\c{iff}&|&\c{iff}|\c{impliedby}&|&\c{impliedby}|\c{implies}&|&\c{implies}|\c{approx}&|&\c{approx}|\c{equiv}&|&\c{equiv}|=&|&=|\c{le}&|&\c{le}|\c{ge}&|&\c{ge}|&\c{stackrel}{.*?}{.*?}|\c{stackrel}{.*?}{.*?}&|&\c{neq}|\c{neq}&) }
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{ \c{kern} \u{l_tmp_dim_needed} \1 \c{kern} \u{l_tmp_dim_needed} }
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\l__lec_text_tl
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\l__lec_text_tl
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}
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\cs_generate_variant:Nn \lec_insert_padding:n { V }
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\ExplSyntaxOff
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