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.

Solving a quadratic equation is difficult.

I am learning how to solve ordinary differential equations.

He worked all night to find the solution to the partial differential equation.

Solving a linear equation is difficult.

Wave function is a fundamental concept in quantum mechanics.