On the validity and reliability of the (G′G′/G)-expansion method by using higher-order nonlinear equations

In this study, we demonstrate the validity and reliability of the so-called (G′G′/G)-expansion method via symbolic computation. For illustrative examples, we choose the sixth-order Boussinesq equation and the ninth-order Korteweg-de-Vries equation. As a result, the power of the employed method is confirmed.