He told me to go easy on him.

He solved complex mathematical problems using his new calculator.

I am working using a spreadsheet software.

His calculating nature sometimes causes problems.

Please check the statement of account.

It's difficult to solve this formula.

Her behavior is always graceful, and she is respected by everyone.

Her behavior was graceful, and everyone respected her.

Astronomy is my favorite subject.

This phenomenon is against the laws of nature.