He lost everything.

My boyfriend gave me a gift.

Everyone was surprised by the news.

He seems like a wolf in sheep's clothing, but he is actually a very kind person.

He likes to take a walk in the park at dusk.

I attended an awards ceremony yesterday.

It's difficult to solve this formula.

We attended his memorial service.

The calculation of determinants is an important part of mathematics.

I learned how to create formulas in math class.