الخلاصة

In this paper, we find the solution of kinds of linear partial differential, equations of variable coefficients and which have the general form as B Z xxx B Z yyy B Zttt B Z xxy B Z xxt B Z xyy B Z yyt B Z xtt B Z ytt B Z xyt Hence 1B,… 20B are variable coefficients. By using some assumptions, we will transform the previous equation into the non-linear second order, ordinary differential equations