what exactly can be used?

The feature with LaTeX is great but somehow I’m constantly having troubles. For example, formulas with square brackets doesn’t seem to be rendered correctly, e.g. $latex [] $. Where can I find an info on what is allowed to do within the latex environment?
Your question prompted me to play with square brackets. And then I did something I’ve been meaning to do for a while: I put out a post illustrating some HTML and some latex. That post is http://rip94550.wordpress.com/2009/01/18/happeningslatex/
In particular, I have found that I can use square brackets in latex in either of two ways.
instead of [ stuff ], you can put curly braces around the whole thing: { [ stuff ] }
or, just as we have \left( and \right), we we can use \left[ and \right]
I hope this helps.
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