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In this paper, we obtained the exact solutions of the Formula: see text-dimensional nonlinear dispersive modified Benjamin–Bona–Mahony (DMBBM) and the seventh-order Sawada–Kotera–Ito (S-K Ito) equations with the help of the Formula: see text-expansion method specially the Formula: see text-expansion and Formula: see text-expansion methods. Soliton solutions found for the given equations are in the form of hyperbolic, trigonometric and rational solutions. All obtained solutions were checked. 3D and 2D graphs of some solutions were given and discussed.
Akbulut et al. (Fri,) studied this question.