I learned the method of factorization in math class.

I learned the method of factoring in math class.

He is studying old written materials.

This epigraph tells the history of many centuries ago.

A mosquito net is necessary for summer nights.

He is studying old literature.

This paperweight is a gift from my father.

There is some inscription carved on this ancient artifact.

He is wearing a shirt with the number eleven.

He has a natural gift for music.