My friend works at a real estate agency.

He was able to solve the complex calculation quickly.

He apologized to me again and again.

I made an appointment at the department of obstetrics and gynecology for tomorrow.

This shape is called a gyrobifastigium.

We will act according to the Mountain Standard Time.

The separation of powers is one of the basic principles of democracy.

In this chemical experiment, we will examine the properties of benzoic acid.

In order to solve problems, it is important to listen to the opinions of many people, as the saying goes, 'two heads are better than one'.

Let's calculate the area of this right-angled triangle.