A. Otenov1, M. Nazhipkyzy2, A. Seitkazinova3, S.V. Agasieva4

1, 4 Patrice Lumumba Peoples’ Friendship University of Russia (Moscow, Russia)
1–3 Al-Farabi Kazakh National University (Almaty, Kazakhstan)
1 аdlet240603@gmаil.соm, 2 meruert82@mаil.ru, 3 аikо3126@mаil.ru