“…In order to find the exact solutions of nonlinear PDEs, many powerful methods have been developed. A few of the methods are: the sub-equation method [8][9][10], the modified simple equation method [11], the exp(−φ(ξ)) method [12,13], homotopy analysis method [14,15] , first integral method [16,17], G/G expansion method [18][19][20], the functional variable method [21,22], the improved tan φ 2 -expansion method [23,24], etc.…”