 In this paper, the effects of non-linear thermal radiation and chemical reaction on MHD-Casin nanofluid flow over a porous stretching slash shrinking surface were studied. A similarity transformation was used to convert the governing coupled partial differential equations into ordinary differential equations, which were then solved using the successive linearization method, SLM, and Chebuchev spectral collocation method. The velocity, temperature, concentration, and entropy profiles were analyzed and compared with previous studies. Additionally, the local Nusseld number and Sherwood number were calculated and compared with the existing literature. This article was authored by Jia Qing, Muhammad Mubashir Bhatti, Minawar Ali Abbas, and others.