He knows a lot of Japanese idioms.

My grandfather takes care of cows in the cowshed every day.

The cleaner is cleaning the park.

That person is good at speaking using dialect.

Linear algebra is a branch of mathematics that studies the theory of vector spaces and linear transformations.

Clifford algebra is a branch of mathematics, and it has a close relationship with physics.

He likes to take a walk in the park at dusk.

He stated his opinion outspokenly as '咢'.

He is majoring in psychology.

Gaku is my best friend.