He is looking outside from the window now.

He always remains calm.

He can always maintain calmness.

He is very excellent as a medical student.

He believes in eternal life.

I was born in the Heisei era.

In linear algebra, it is important to calculate the outer product of vectors.

His death brought deep sorrow to all of us.

He is wishing for eternal peace.

This problem can be solved using the principle of linearity.