I can give you an explanation of godel numbers and how we proved that all general logical systems will have contradictions (knowledge gotten from youtube though), but tell me to subtract a two numbers and I'll need a minute.

As for calculus, I didn't take the class in high school, but I do watch videos about infinite series and proofs which I find fascinating now. I plan on going to college (2nd attempt) and I'm certain I'll be much more proficient in it once I learn the fundamentals.