His art style is unique, it's neither fish nor fowl.

Hydrocarbon is a basic element of chemical reactions.

He lined his pockets with that project.

Heavy hydrogen is one of the isotopes of hydrogen.

She is interested in numerology.

Combinatorial mathematics is a branch of mathematics that studies the combinations of things.

He is majoring in applied mathematics at university.

The number subtracted from the minuend is called the subtrahend.

He is studying phallicism.

I can fall asleep immediately after taking a sleeping pill.