Some of the calculations were a bit complicated, but that's ok! I played in medium and finished in 112 seconds. Some of the calculations are in double, I don't know if it's a bug or if it's done on purpose.
Yeah, the game just picks the calculations randomly from a list , and PICO-8's pseudo-random generator sometimes gives the same value multiple times within the 10 picks. I decided to go with pre-made calculations to have some control over the difficulty. Thanks for playing!