Madness of Fluxions

To start, a request for technical advice.

I expect to be putting quite a few bits of math notation here. Does anyone have any bright ideas on how I can go about doing that? The basic options seem to be MathML (I’m not sure how it works) and just using inline .jpg files. Is there anything better out there? (And does anyone know of any simple, straightforward software that lets you type math symbols and outputs image files directly?)