In mathematics, the commutative law applies to addition and multiplication.

The distributive law is one of the basic laws of mathematics.

He is immersed in the study of positivism.

He is a famous philosopher.

This company strictly adheres to the principle of fair trade.

You can solve the problem by using this method.

He saved money using the 'hou' (alternative spelling of 'fran') to go to France.

He has a very passive personality.

He walked on the moon wearing a space suit.

I am interested in space exploration.