(in lingua inglese)
In this paper, the first integral method has been used to construct exact traveling wave solutions of nonlinear partial differential equations, the B(n,n) equation and the generalized sine-Gordon equation and a kind of nonlinear reaction–diffusion equation and generalized form of the double sinh-Gordon equation. The performance of this method is found to be reliable and effective and it give more solutions. This method has the advantages of being direct and concise. The method proposed in this paper can also be extended to solve some nonlinear evolution equations in mathematical physics.