Trouble Getting Your Computer to Display Math?
If you ask a question through email you may receive a reply that looks something like
\[\left[\begin{array}{ccccc}
1&7&8&2&3 \\
4&2&4&9&7 \\
3&5&7&1&8 \\
\end{array}\right]\]
How to make sense out of such a mess?
 http://alexeev.org/gmailtex.html is Gmail pluggin. Install this in order to read math inside of gmail emails.
(Supposedly, this pluggin works with most email programs, not just gmail. I had to log in and out of Gmail a few times before this started working correctly.)

start ChatJax Don't click this link. It is not a link to a web site!
^^drag this^^ to your bookmark bar or right click on it to add it as a bookmark.
Now whenever you see this \[\begin{bmatrix}8&2\\ \end{bmatrix}\] or $ \binom{6}{2} $ stuff in a webpage, just click the "ChatJax" bookmark.
(ChatJax does not seem compatible with email programs.)
 http://www.mathjax.org/demos/ If neither of the above work, just copy the text onto your clipboard, and paste
it into the text box at the MathJax page.