Solitary wave solutions for a certain class of nonlinear differential equations

Generalized forms of exact solitary wave solutions of the class (1.1) are investigated. The analysis rests mainly on the standard a direct algebraic method. The most general solutions are obtained, possibly having a constant term in their expansion into real exponentials. These solutions of the class (1.1) are performed under certain conditions for the relationship between the coefficients of the nonlinear, dispersive and dissipative terms. The analytical solutions of this class are of pulse-type and of kink-type solitary wave solutions and they are obtained with an arbitrary constant phase shift.