Understanding chemical equations is difficult.

He is good at solving algebraic equations.

Solving a linear equation is difficult.

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.

He has a dream of going to the South Pole.

He accurately understood the location of the pressure points.

This painting is characterized by its vermilion spots.

When reading Kambun, you must pay attention to the position of the reten.