You're noisy, so please be quiet.

In May, there is Golden Week in Japan.

He is passionate about researching pure mathematics.

He is majoring in applied mathematics at university.

You've worked hard today, good night.

Welcome back, mom is waiting for you.

He is a world-famous mathematician.

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

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

Combinatorics is a branch of mathematics dealing with issues of order and choice.