CEDICT
mathematics
Wiktionary
讨论数量、形状及它们之间的关係的科学。包括算术、代数、几何、三角、解析几何、微分、积分等。
重編國語辭典
She studies mathematics.
Source: Tatoeba
Are you good at mathematics?
Are you good at math?
Are you good in math?
Tom isn't good at math.
Tom is not good at math.
Tom is bad at math.
He is very good at math.
I am not good at mathematics.