I am learning how to solve ordinary differential equations.

I am learning how to solve differential equations.

He worked all night to find the solution to the partial differential equation.

I like to study new languages.

I am good at solving differentiation problems.

He used differentiation to solve the math problem.

He is good at solving that equation.

I go jogging every day.

He is a person who always keeps a smile on his face.

He was always thinking about me.