Method d. R. Saparbayeva

Conclusions
In this paper, the (G^′/G)-expansion method is used to conduct an analytic study on the double sinh-Gordon with loaded equation. The exact traveling wave solutions being determined in this study are more general, and it is not difficult to arrive at some known analytic solutions for certain choices of the parameters. Comparing the proposed method with the methods used in [1–8], show that the (G^′/G)-expansion method is not only simple and straightforward, but also avoids tedious calculations
References

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with the highest order nonlinear term(s) in equation (3).