New explicit and travelling wave solutions for a class of nonlinear evolution equations

In this paper, with the help of Mathematica, three travelling wave solutions for a class of nonlinear evolution equations u(tt) + au(xx) + bu + cu(3) = 0 are obtained by trigonometric function method and Wu-eliminition method which include new trarelling wave solutions, bell soliton solutions and kink soliton solutions. Some equations such as Duffing equation, Klein-Gordon equation, Landau-Ginburg-Higgs equation and phi(4) equation are particular cases of the evolution equations. The method also can be applied to other nonlinear equations.