∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : CategoryTheory.Limits.HasCoequalizers C]
  [inst_3 :
    ∀ (X : C),
      CategoryTheory.Limits.PreservesColimitsOfSize.{0, 0, u_1, u_1, u_2, u_2}
        (CategoryTheory.MonoidalCategory.tensorLeft X)]
  [inst_4 :
    ∀ (X : C),
      CategoryTheory.Limits.PreservesColimitsOfSize.{0, 0, u_1, u_1, u_2, u_2}
        (CategoryTheory.MonoidalCategory.tensorRight X)]
  {R S T U : CategoryTheory.Mon C} (P : Bimod R S) (Q : Bimod S T) (L : Bimod T U),
  CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerRight P.actRight (Q.tensorBimod L).X)
      (Bimod.AssociatorBimod.invAux P Q L) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.MonoidalCategoryStruct.associator P.X S.X (Q.tensorBimod L).X).hom
        (CategoryTheory.MonoidalCategoryStruct.whiskerLeft P.X (Q.tensorBimod L).actLeft))
      (Bimod.AssociatorBimod.invAux P Q L)