MathJax Test Page
If you see typeset mathematics below, then MathJax is working. If you see TeX code instead, MathJax is not working for you.
\[ \frac{-b\pm\sqrt{b^2-4ac}}{2a} \]
MathJax is not working!
If the mathematics does not show up properly, you may not have not installed the MathJax web fonts correctly. Follow the steps in the installation instructions.