我擅长数学，我也喜欢历史和地理，但我最喜欢的科目是科学。

I am good at math. I also like history and geography but my favorite subject is science.

youdao

我擅长数学，我想当一名科学家。

I am good at Mathematics, I want to be a scientist.

youdao

当然了，我擅长数学，我觉得这很有趣。

Sure. I'm good at math and I think it's very interesting.

youdao

The math quiz is on calculus, and I am really bad at it.

这次数学考试是关于微积分的，是我特别不擅长的部分。

I'm worried 实战 - SpeakingMax英语口语达人

Well, I guess I've always been good at maths and computer science.

我一直擅长学习数学和计算机。

我的梦想是百万富翁 - SpeakingMax英语口语达人

I'm just like, really bad at math and science.

我只是不擅长数学和科学。

考试考砸了怎么办 - SpeakingMax英语口语达人