**5. Conclusions**

The MHD flow of three combined fluids, Maxwell, Jeffry, and Oldroyed-B fluid, with variable heat transmission under the influence of thermal radiation was investigated. The fundamental leading equations were changed to a set of differential nonlinear and coupled equations. An optimal and numerical tactic was used to acquire the solution of the modeled problems.

The key conclusions of this work are as follows:


**Author Contributions:** A.S.K. and Z.S. modeled the problem and wrote the manuscript. Y.N. thoroughly checked the mathematical modeling and English corrections. A.S.K. and Z.S. solved the problem using Mathematica software. Y.N. contributed to the results and discussions. All authors finalized the manuscript after its internal evaluation.

**Funding:** This research was funded by National Natural Science Foundation of China No. [11471262]. **Conflicts of Interest:** The authors declare no conflict of interest.
