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.

You can use spectroscopy to examine the components of a substance.

We conducted a meta-analysis on this issue.

I like reading uncle's composition.

He is majoring in humanities at university.