It's difficult to solve these mathematical problems.

解决这些数学问题很困难。

youdao

Equations are of very great use. We can use equations in many mathematical problems.

方程很有用，可以用它来解决许多实际应用问题。

youdao

Equations are of very great use. We can use equations in many mathematical problems.

方程很有用，可以用它来解决许多实际应用问题。

youdao