The [math] tag lets you easily embed nicely formatted math in your questions and answers. The particular convention Ask Me Help Desk uses is mimeTex, a version of LaTeX. Please read the tutorial if you would like to use it extensively.

Example usage:

Code:

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[math]x{\small_1}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/máth]

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Example output:

Wikipedia uses a slightly different version of tex, but I find their help page on displaying formulae well laid out and very useful when I'm searching for how to display a symbol I haven't used before.

The only real difference I have found is that they use <math></math> instead of [math][/mth].

The page can be found here: Help - Displaying a formula - Wikipedia, the free encyclopedia