my Latex and Tex4ht cheat sheet

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw [very thin] (1,1) rectangle (2,2);
\draw [] (3,0) -- (0,0) -- (0,3);
\end{tikzpicture}
\end{document}
\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw [] (3,0) -- (0,0) -- (0,3);
\draw [very thin] (1,1) rectangle (2,2);
\draw [fill=lightgray] (1,1)--(1.5,1)--(1,1.5);
\end{tikzpicture}
\end{document}
\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\def\x{0}%
\def\y{0}%
\draw [very thin] (\x,\y) rectangle (\x+2,\x+2);
\draw [fill=lightgray] (\x,\y)--(\x+1.75,\y+0)--(\x+0,\y+1.75);
\node[font=\Huge] at (\x+1.25,\y+1.25) {$0$};
\node at (\x+2.25,\y+1) {$+$};
A
=
L
0
+
0
\end{tikzpicture}
\end{document}
86