Summary: In this article, the application of the MathCAD software package for solving differential equations with partial derivatives is considered.

Key words: mathematics editor, differential equations, partial derivatives.

Summary: This article discusses the use of MathCAD software to solve differential equations of the first order.

Key words: mathematics еeditor, differential equations, Lagrange method.

Summary: we consider the different types of software that allow to make calculations for engineering and mathematical problems.  Their strengths and weaknesses  explored.

Key words: mathematics editor, finite elements method, engineering modeling.