He is doing research on prime numbers.

If you subtract the subtrahend, you will get the answer.

His robbery ended in an attempt.

We go sea bathing with the family during the summer vacation.

I feel a lack of sleep.

He was hospitalized for dropsy.

The computer generates a random number.

This equation can be divided without a remainder.

This equation can be divided without a remainder, so there is no remainder.

This galaxy is a trillion trillion light years away.