“…( 1) can be found using the traveling wave solutions. These solutions can be found using special methods (see, for example, Alotaibi 2021, Biswas et al 2021c, Ege 2022, Ekici 2022, Eldidamony et al 2022a,b, González-Gaxiola 2022, Kudryashov 1991, 1990, 2005, 2009, 2012, 2020a,c,e, 2021a,b,c, 2022a,b,c, Ozisik et al 2022, Raheel et al 2022b, Vitanov 2010, 2011a,b, Vitanov and Dimitrova 2010, Wang 2022a,b, Zayed et al 2022.…”