Analytical solutions for nonlinear long–short wave interaction systems with highly complex structure

In this paper, we investigate and use the new modified exp(−Ω(ξ))(−Ω(ξ))-expansion method, (MEM). We apply the new MEM to nonlinear long–short-wave interaction systems (NLSWIS). Among our findings are sets of solutions including, but not limited to, new hyperbolic, complex, and dark soliton solutions. Not only is MEM shown to be highly adaptable for partial differential equations with strong nonlinearities, but also, it turns out to be highly efficient, despite its ease.