Exp-function method for some nonlinear PDE’s and a nonlinear ODE’s

In this paper, we apply the exp-function method to find some exact solutions for two nonlinear partial differential equations (npde) and a nonlinear ordinary differential equation (node), namely, cahn-hilliard equation, allen-cahn equation and steady-state equation, respectively. it has been shown that the exp-function method, with the help of symbolic computation, provides a very effective and powerful mathematical tool for solving npde’s and node’s. mainly we try to present an application of exp-function method taking to consideration rectifying a commonly occurring errors during some of recent works. the results of the other methods clearly indicate the reliability and efficiency of the used method.