mathematics
General term for the academic field of mathematics.
彼は大学で数学を専攻している。
He is majoring in mathematics at university.
数学の宿題が難しくて、なかなか終わらない。
The math homework is difficult and I can't seem to finish it.
He is good at math.
I'm not good at math.
I study math every night.
This math problem is hard to solve.
metamathematics
metamathematics