Translation of "Solving" in Chinese

Takeo is engrossed in solving mathematical problems.

建夫专心致志地解决数学问题。

I had difficulty in solving this problem.

- 我在解決這個問題上有困難。
- 我很難解決這個問題。

He found no difficulty in solving the problem.

他不費吹灰之力就把問題解決了。

He is good at solving complicated mathematical problems.

他擅长解答数学难题。

Science is still not capable of solving all of life's problems.

科學還無法解決所有生活上的問題。