Naomasa is my best friend.

Politicians are the leaders of the country.

I was born and raised in Mimasaka city.

His opinion was the exact opposite of my thoughts.

We always take into account the needs of our regular customers.

He solved a large number of problems.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

I can't solve this problem because there are too many numbers.

He is passionate about researching pure mathematics.