You're noisy, so please be quiet.

You've worked hard today, good night.

I'm sorry for being late.

Welcome back, mom is waiting for you.

In May, there is Golden Week in Japan.

Discrete mathematics is an important field that forms the basis of computer science.

He is majoring in applied mathematics at university.

He is passionate about researching pure mathematics.

He is a world-famous mathematician.

Combinatorics is a branch of mathematics that studies combinations of things.