All his actions are nothing but hearsay.

Nutrients are essential for the growth of plants.

I learned how to calculate definite integrals in math class.

The calculation of the antiderivative is a fundamental part of calculus.

The calculus of variations is a branch of mathematics that deals with the optimization of functions.

I am majoring in French literature at university.

In this company, being late is not allowed as an unwritten rule.

He wrote a poem using the four treasures of the study.

Analytical chemistry is a science for clarifying the components and structure of substances.

He is majoring in syntax at university.