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Poom Kumam
Department of Mathematics, Faculty of Science, King Mongkut’s University of Technology Thonburi (KMUTT), 126 Pracha Uthit Road, Bang Mod, Thung Khru, Bangkok 10140, Thailand
Muhammad Sarwar
Department of Mathematics, University of Malakand, Chakdara Dir(L), Pakistan
Mian Bahadur Zada
Department of Mathematics, University of Malakand, Chakdara Dir(L), Pakistan