He always proactively suggests new ideas.

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

He claims to be a warrior for freedom of expression, but in reality, he's just someone who uses derogatory words.

He likes to take a walk in the park at dusk.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He is good at tactical thinking.

He exercises every day and leads a healthy life.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

This park was completely artificially made.