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

I studied linear algebra at university.

He is an expert in algebraic geometry.

He is good at algebra.

There are times when we perform calculations with the haversine in trigonometry.

This equation is linear.

This is a linear mathematical problem.

He is known as a person with learning.

There was a long queue in front of the movie theater.

People were forming a line from early morning to buy concert tickets.