OICC Press Mathematical Analysis and its Contemporary Applications 4 2 2022 03 21 Notes on the stability of multimixed additive-quartic mappings 10.30495/maca.2022.1949403.1045 EN Yousef Ebrahimdoost Department of Mathematics, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran Journal Article 2022 03 21 In this article, we prove the Hyers-Ulam stability of multimixed additive-quartic functional equations in the setting of Banach spaces by applying a fixed point method and moreover we generalize some known results.