青云翻译

Higher-order nonlinear differential equations in the solution side of equations for a number of attempts.

In solving equations of higher order nonlinear differential equations for a number of attempts.

Has carried on some attempts in the solution higher order nonlinear differential equation side system of equations.

In this high-level non-linear differential equations parties try to carry out some set of equations.

In solving equations of higher order nonlinear differential equations for a number of attempts.