mathematics
/ˌmæθəˈmætɪks; ˌmæθə`mætɪks/ n[sing or pl v]
(also Brit infml 英式口语作 maths / mθs; mæθs/ [sing or pl v]; US math / mθ; mæθ/ [sing v]) science of numbers, quantity and space, of which eg arithmetic, algebra, trigonometry and geometry are branches 数学
His mathematics are weak, ie He is not very good at doing calculations, etc. 他数学不好.
Maths is her strongest subject. 数学是她最强的科目.
I don't understand the mathematics (eg the complicated calculations) here. 我不明白这里复杂的数学运算.