He solved complex mathematical problems using his new calculator.

His calculating nature sometimes causes problems.

I am working using a spreadsheet software.

Please check the statement of account.

He is dedicated to the study of immunochemistry.

This shirt is made of chemical fiber.

The use of chemical weapons is prohibited by international law.

I am majoring in biochemistry at university.

I love organic chemistry classes.

I am majoring in inorganic chemistry at university.