this looks interesting, and I think would be perfect for the kind of stuff I deal with. Unfortunately, the pricing looks less interesting (about $100 for a 1000 page pdf, if I'm reading it right, although possibly I could attempt to break the pdf up into pages which have the math). There was an older solution for this which costs about $200 as a whole.

Stuff like this exists, and is possibly pretty reasonable monetarily, but not being in the U.S., exchange rates hit me hard.

I've bookmarked this and will look into this more, though, thanks!