In the present article, a direct approach, namely exp(-?)-expansion method,
is used for obtaining analytical solutions of the Pochhammer-Chree equations
which have a many of models. These solutions are expressed in exponential
functions expressed by hyperbolic, trigonometric and rational functions with
some parameters. Recently, many methods were attempted to find exact
solutions of nonlinear partial differential equations, but it seems that the
exp(-?)-expansion method appears to be efficient for finding exact solutions
of many nonlinear differential equations.