1. School of Mathematics and Statistics, Pingdingshan University, Pingdingshan, Henan 467000, China
2. Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Tabriz, Tabriz, Iran
3. Natural Sciences Faculty, Lankaran State University, 50, H. Aslanov str., Lankaran, Azerbaijan
4. Al-Nisour University College, Baghdad, Iraq
5. Anesthesia Techniques Department, Al-Mustaqbal University College, Babylon, Iraq
6. Department of Economic Security, Tashkent State University of Economics, Tashkent, Uzbekisktan
7. Department of System Programming, South Ural State University, 454080, Chelyabinsk, Russia