% arara: pdflatex
% arara: pdflatex
% arara: pdflatex

\documentclass[a4paper, landscape]{article}
\pagestyle{empty}
\usepackage[showframe=false,
margin=20mm,
]{geometry}
%\geometry{paperwidth=15cm, paperheight=30cm, margin=2mm}% optional
%\usepackage{mwe} % Dummy Images
\usepackage{textcomp} % \textcopyright

\usepackage{tikz}
\usetikzlibrary{calc}
\pgfkeys{/tikz/savevalue/.code 2 args={\global\edef#1{#2}}}
%\pagecolor{lightgray!22} % see page margins

\usepackage[most]{tcolorbox}
\tcbset{
NoGaps/.style={boxsep=0mm, left=0pt, right=0pt, top=0pt, bottom=0pt, before skip=0pt, after skip=0pt,},

% arara: pdflatex
% arara: pdflatex
% arara: pdflatex

\documentclass[a4paper, landscape]{article}
\pagestyle{empty}
\usepackage[showframe=false,
margin=20mm,
]{geometry}
%\geometry{paperwidth=15cm, paperheight=30cm, margin=2mm}% optional
%\usepackage{mwe} % Dummy Images
\usepackage{textcomp} % \textcopyright

\usepackage{tikz}
\usetikzlibrary{calc}
\pgfkeys{/tikz/savevalue/.code 2 args={\global\edef#1{#2}}}
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background,main,foreground}

tlmgr update --self

tlmgr update --all

https://cocalc.com/doc/latex-editor.html

\documentclass{beamer}
\newcommand{\var}[1]{\operatorname{var}{\!#1}}
\begin{document}
\begin{frame}
\visible<+->{
Intro text}
\begin{align*}
\visible<.->{\Pr(Y_r >0) &= \Pr(Y_r \geq 1) \leq \frac{\mathbb{E}(Y_r)}{1} = \frac{d}{2^r}}
\visible<+->{
\intertext{More text,}
\visible<+->{\Pr(Y_r=0)} & \visible<+->{\leq \Pr(|Y_r-\mathbb{E}(Y_r)| \geq d/2^r)} \visible<+->{\leq \frac{\var(Y_r)}{(d/2^r)^2}} \visible<+->{\leq \frac{2^r}{d}}
}
\end{align*}
\end{frame}
\end{document}

:55446244 > \duckB=macro:
->breakfast.

\documentclass{article}
\usepackage{stix}
\begin{document}

$ \lbrackubar abc \rbrackubar$
\end{document}

% arara: pdflatex
% arara: pdflatex
% arara: pdflatex
% arara: ghostscript: {  resolution: 166  , device: png16m}

\documentclass[a4paper, landscape]{article}
\pagestyle{empty}
\usepackage[showframe=false,
margin=20mm,
]{geometry}
%\geometry{paperwidth=15cm, paperheight=30cm, margin=2mm}% optional
%\usepackage{mwe} % Dummy Images
\usepackage{textcomp} % \textcopyright

\usepackage{tikz}
\usetikzlibrary{calc}
\pgfkeys{/tikz/savevalue/.code 2 args={\global\edef#1{#2}}}
\pgfdeclarelayer{background}

418
stat error

The Spanish Inquisition raised an unexpected error. Cannot continue without comfy-chair-interrogation.

$ lualatex small2e
This is LuaHBTeX, Version 1.12.0 (TeX Live 2020)
 restricted system commands enabled.
(/usr/local/texlive/2020/texmf-dist/tex/latex/base/small2e.tex
LaTeX2e <2020-02-02> patch level 5


 L3 programming layer <2020-09-03>

$ pdflatex small2e
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(/usr/local/texlive/2020/texmf-dist/tex/latex/base/small2e.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-09-03>

Lua module: luaotfload-main 2020-09-02 3.15 luaotfload entry point
Lua module: luaotfload-init 2020-09-02 3.15 luaotfload submodule / initializatio
n
Lua module: lualibs 2020-08-31 2.72 ConTeXt Lua standard libraries.
Lua module: lualibs-extended 2020-08-31 2.72 ConTeXt Lua libraries -- extended c
ollection.
Lua module: luaotfload-log 2020-09-02 3.15 luaotfload submodule / logging
Lua module: luaotfload-parsers 2020-09-02 3.15 luaotfload submodule / parsers
Lua module: luaotfload-configuration 2020-09-02 3.15 luaotfload submodule / conf

(c:/Users/Nililand2020/Documents/TeXroots/gitinstall/tex/latex-dev/tools/longta
ble.sty
Package: longtable 2020/01/07 v4.13 Multi-page Table package (DPC)
\LTleft=\skip49
\LTright=\skip50
\LTpre=\skip51
\LTpost=\skip52
\LTchunksize=\count184
\LTcapwidth=\dimen139
\LT@head=\box48
\LT@firsthead=\box49
\LT@foot=\box50
\LT@lastfoot=\box51
\LT@cols=\count185
\LT@rows=\count186
\c@LT@tables=\count187
\c@LT@chunks=\count188
\LT@p@ftn=\toks15
)

Lua module: luaotfload-main 2020-09-02 3.15
Lua module: luaotfload-init 2020-09-02 3.15
Lua module: lualibs 2020-08-31 2.72
Lua module: lualibs-extended 2020-08-31 2.72
Lua module: luaotfload-log 2020-09-02 3.15

The property list \polyglossia@langsetup contains the pairs (without outer
braces):
>  {latex/script}  =>  {latin}
>  {latex/lcscript}  =>  {latin}
>  {latex/scripttag}  =>  {}
>  {latex/language}  =>  {Latex}
>  {latex/langtag}  =>  {ENG}
>  {latex/bcp47}  =>  {}
>  {latex/hyphennames}  =>  {english}
>  {latex/direction}  =>  {LR}
>  {latex/hyphenmins}  =>  {2,3}
>  {latex/frenchspacing}  =>  {false}
>  {latex/indentfirst}  =>  {false}
>  {latex/fontsetup}  =>  {true}
>  {latex/envname}  =>  {latex}

\documentclass{article}
\usepackage{libertinus}
\usepackage{listings}
\lstset{basicstyle=\ttfamily,columns=flexible,language=TeX}
\begin{document}
\begin{lstlisting}[caption={A simple document}]
\begin{forest}
    [DP [D\\the ] [NP [N\\man ]]]
\end{forest}
\end{lstlisting}
\end{document}

% !TeX TS-program = lualatex

\documentclass{article}
\usepackage{libertinus}
\usepackage{listings}
\lstset{basicstyle=\ttfamily,columns=flexible,language=[LaTeX]{TeX},deletetexcs={the}}
\begin{document}
\begin{lstlisting}[caption={A simple document}]
\begin{forest}
    [DP [D\\the ] [NP [N\\man ]]]
\end{forest}
\end{lstlisting}
\end{document}

\documentclass{article}

\begin{document}
\ExplSyntaxOn
\sys_get_shell:nnN{extractbb~--version}{}\l_tmpa_str
\exp_args:Nno\regex_extract_once:nnN{\d+}{\l_tmpa_str}\l_tmpa_seq
\int_compare:nNnTF {\seq_item:Nn\l_tmpa_seq{1}}<{20200801}{Old~dvipdmx}{New~dvipdfmx}

\ExplSyntaxOff
\end{document}

\documentclass{article}

\begin{document}
\ExplSyntaxOn
\sys_get_shell:nnN{extractbb~--version}{}\l_tmpa_str
\str_new:N\g_uf_dvipdfmx_version_str
\cs_new:Npn \uf_extract_version:w #1n#2C#3\q_stop
  {\str_gset:Nn\g_uf_dvipdfmx_version_str{#2}}
\exp_last_unbraced:No \uf_extract_version:w \l_tmpa_str\q_stop

\int_compare:nNnTF {\g_uf_dvipdfmx_version_str}<{20200801}{Old~dvipdmx}{New~dvipdfmx}

\ExplSyntaxOff
\end{document}