New exact solutions of nonlinear variants of the RLW, the PHI-four and   Boussinesq equations based on modified extended direct algebraic method
  By means of modified extended direct algebraic method (MEDA) the multiple exact complex solutions of some different kinds of nonlinear partial differential equations are presented and implemented in a computer algebraic system. New complex solutions for nonlinear equations such as the variant of the RLW equation, the variant of the PHI-four equation and the variant Boussinesq equations are obtained. 
A. A. Soliman, H. A. Abdo
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