It would be nice to just insert the image directly... so I'm experimenting with a couple of sites and services to see what is available. I found this site: http://www.mathtran.org. Let's see how this works.
From what I can tell, MathTran is a site where you can create an account to store and view formulas written in a varient of LaTeX (mostly LaTeX, but they also do some minor formatting changes and don't allow \begin{environment} and \end{...} tags). It looks to be funded through an OpenUniverseity grant in the UK. The script does not appear to be account-dependent, so you can create the tex in the image source yourself, but it will probably be better for me if I can organize the forumlas by post.