帮忙翻译一个中文句子。不要软件翻

we use geometrical figures to explain the concepts which is difficult to understand only by analyzing the equations.

Using geometry to explain the difficult to understand from the analysis by the concept of nonlinear regression.

The use of geometry to explain the formula from the analysis it is difficult to understand the concept of non-linear regression.

Difficult to make use of geometric figure to explain from analyzing the concept of non-linear return understanding that the formula comes.