The variational iteration method combined with improved generalized tanh–coth method applied to Sawada–Kotera equation

We obtain new exact solutions to generalized Sawada–Kotera equation. Using the variational iteration method combined with the improved generalized tanh–coth method, we construct new traveling wave solutions for the standard Sawada–Kotera equation and, by means of scaling, we obtain new solutions to general Sawada–Kotera equation. Periodic and soliton solutions are formally derived for both models.