, Department of Higher Mathematics and Computer Science, Khmelnytskyi National University, Khmelnytskyi, Ukraine (Ukraine)
, Department of Mathematics and Programming Technology, Gomel Francisk Skorina State University, Gomel, Belarus (Belarus)
, Department of Mathematics, Jeju National University, Jeju-si, South Korea Department of Mathematics & IT, P.M. Masherov Vitebsk State University, Vitebsk, Belarus
, Department of Excellent Mathematics, Dnipro National University, Dnipro, Ukraine
, Department of Algebra, Uzhhorod National University, Uzhhorod, Ukraine (Ukraine)

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