I use LaTeX almost exclusively for my University assignments. While searching for something online I came across http://latex.codecogs.com/gif.latex. This site allows you to pass in a formula as a GET parameter and it gives you back the formatted LaTeX.

For example this URL http://latex.codecogs.com/gif.latex?E_{yass}%20\equiv%20\frac{N^2}{B^2}%20\times%208^2 will produce this image

Now I just need to figure out where I can use it…