 In this paper, the effects of nonlinear thermal radiation and chemical reaction on MHD-Casin nanofluid flow over a porous stretching slash shrinking surface were studied. The governing equations were transformed using similarity transformations and then solved numerically using Chebyshev spectral collocation methods. The results showed that the velocity, temperature, concentration, entropy profiles, and local Nusselt and Sherwood numbers all depended on the various parameters of interest. Additionally, the results were compared to those obtained in previous studies. This article was authored by Jiaqin, Muhammad Mubashir Bhatti, Minawar Ali Abbas, and others.