Very cool!
What made you choose LaTeX for the tool?
It seems like it wouldn't be too hard (maybe?) to get a proper algebra engine to assign variables. Currently you can do `x = 10` but you can't do `x / 2 = 5`. I feel like this would be very helpful since you're using this for scientific calculations.
It could then be possible to extend that further and leave the variable undefined if it doesn't (yet) have enough information to solve it. Then it could theoretically be used to solve simultaneous equations.