LaTeX software for Windows:

• MiKTeX, a distribution of LaTeX for Windows
• shells for editing LaTeX

General help with LaTeX:

• LaTeX math symbols
• Help with LaTeX2e

To put a slash through a symbol in math mode, preface it immediately with \not. For example, $\not\subset$, will give the subset symbol crossed through.

Some example code for doing braces in math mode is:

\[
b_{ki}b_{li}=
\left\{
\begin{array}{rl}
1 & \mbox{if } b_{ki}=b_{li}=1, \mbox{ or } b_{ki}=b_{li}=-1 \\
-1 & \mbox{if } b_{ki}=-1 \mbox{ and } b_{li}=1, \mbox{ or } b_{ki}=1
\mbox{and } b_{li}=-1 \\
0 & \mbox{if } b_{ki}=0 \mbox{ or } b_{li}=0\\
\end{array}
\right.
\]

For symbols such as the reals and complex numbers, \usepackage{amsfonts} and use the commands \mathbb{} in math mode (e.g. $\mathbb{R}$ for the reals).