摘要

In this Letter, we investigate two nonlinear equations given by ut - ux x t 3 u2 ux = 2 ux ux x u ux x x and ut - ux x t 4 u2 ux = 3 ux ux x u ux x x. Through some special phase orbits we obtain four new exact solutions for each equation above. Some previous results are extended.

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