LATEX: (Here, all commands reference version 2)

L_AT_EX: (Here, all commands reference version 2e).

All commands begin with a backslash (ex. \tilde{a})
Necessary attributes live inside { }
Optional attributes live inside [ ]
(ex. \includegraphics[height=2cm]{filename.ps} )
Enter or any number of spaces is equivalent to a single space.
A blank line of text indicates a new paragraph.

All documents begin the same way:

\documentclass[12pt]{article}
\begin{document}

This is the document environment. Everything typed here goes into the document.
We specify different environments with the \begin{env}...\end{env} commands.

For in-line equations use \begin{math} x^{2}+y^{2}=1 \end{math}
or alternatively, \( x^{2}+y^{2}=1 \), or even $x^{2}+y^{2}=1$.

For displayed equations use \begin{displaymath}...\end{displaymath} or alternatively, \[...\]

You can even display a list of equations:
\begin{eqnarray} x & = & \cos^{2}(x) + \sin^{2}(x) \\
& = & 1 \end{eqnarray}

\end{document}

Thanks to Rob Guzzo for developing this page.