The prepositional case plays an important role in English grammar.

Postfix notation is one method of expressing calculations.

Prefix notation is a notation where the operator comes before the operands.

Year in, year out, we continue to grow.

We have a strong sense of camaraderie.

It's difficult to solve this mathematical expression.

This simple system is easy to use.

He threw the first ball at the ceremonial first pitch.

He had a hard time finding his dog's tag.

The tone of this painting is very beautiful.