My grandfather studied medicine at the Imperial University.

The Neolithic was an important period in human history.

They used Euclid's algorithm to find the greatest common divisor.

Please teach me how to find the greatest common divisor.

The history of the British Empire occupies a particularly important part in world history.

Abstract algebra is a branch of mathematics that studies algebraic structures.

The Paleolithic is the first era of human history.

My grandfather was born in the 1900's.

Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.

I am studying Modern English.