He is good at solving trigonometry problems.

He is good at solving problems of trigonometric functions.

He trains his deltoid muscles at the gym every day.

It's difficult to solve this formula.

He solved complex mathematical problems using his new calculator.

His calculating nature sometimes causes problems.

I am working using a spreadsheet software.

Please check the statement of account.

Sleeping in the springtime, I ended up sleeping soundly until late in the morning.

The one-eyed goblin was dancing in the forest.