He decided to change his character.

He said he would come back tomorrow.

I solved this problem over and over again, and finally understood all the patterns thoroughly.

My schedule has changed.

He is a very talented arranger.

He treats everyone fairly without prejudice.

This car is equipped with an automatic transmission.

His new song is composed in E flat major.

Variational method is a branch of mathematics used to find the minimum and maximum values of functions.