some new soliton solutions for the nonlinear the fifth- order integrable equations

in this work, we established some exact solutions for the (1 + 1)-dimensional and (2 + 1)-dimensional fifth- order integrable equations ((1 + 1)d and (2 + 1)d foies) which is considered based on the improved tanh(ϕ (ξ)/2)- expansion method (ithem), by utilizing maple software. we obtained new periodic solitary wave solutions. the obtained solutions include soliton, periodic, kink, kink- singular wave solutions. comparing our new results with wazwaz results, namely, the hereman-nuseri method shows that our results give further solutions. many other such types of nonlinear equations arise in fluid dynamics, plasma physics, and nonlinear physics.