I cashed in a lot of round tuits and updated the infrastructure on my site. One new addition is MathJax.

MathJax is a JavaScript suite which handles setting math in the browser. Users can type in TeX or LaTeX, and the output can be MathML or a graphical rendering in HTML of the code.

Testing: If \(ax^2 + bx + c = 0\), then \(x = \displaystyle\frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \).

Seems to work pretty well. Server-side methods that parse the body for TeX code, then ran TeX, converted to an image, and served the image, were always kludgy. This is client-side (so it depends on the viewer's software to see), but JavaScript is used in most graphical browsers, so it makes sense to rely on it. If a user can view Facebook, they can view MathJAX.