∀ {C : Type u_4} [inst : CategoryTheory.Category.{u_3, u_4} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  {D : Type u_6} [inst_2 : CategoryTheory.Category.{u_5, u_6} D] [inst_3 : CategoryTheory.MonoidalCategory D]
  {E : Type u_2} [inst_4 : CategoryTheory.Category.{u_1, u_2} E] [inst_5 : CategoryTheory.MonoidalCategory E]
  (F : CategoryTheory.Functor C D) (G : CategoryTheory.Functor D E) [inst_6 : F.LaxMonoidal] [inst_7 : G.LaxMonoidal]
  (x x_1 x_2 : C),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight
        (CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ G (F.obj x) (F.obj x_1))
          (G.map (CategoryTheory.Functor.LaxMonoidal.μ F x x_1)))
        ((F.comp G).obj x_2))
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.CategoryStruct.comp
          (CategoryTheory.Functor.LaxMonoidal.μ G (F.obj (CategoryTheory.MonoidalCategoryStruct.tensorObj x x_1))
            (F.obj x_2))
          (G.map (CategoryTheory.Functor.LaxMonoidal.μ F (CategoryTheory.MonoidalCategoryStruct.tensorObj x x_1) x_2)))
        ((F.comp G).map (CategoryTheory.MonoidalCategoryStruct.associator x x_1 x_2).hom)) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.associator ((F.comp G).obj x) ((F.comp G).obj x_1)
          ((F.comp G).obj x_2)).hom
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.MonoidalCategoryStruct.whiskerLeft ((F.comp G).obj x)
          (CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ G (F.obj x_1) (F.obj x_2))
            (G.map (CategoryTheory.Functor.LaxMonoidal.μ F x_1 x_2))))
        (CategoryTheory.CategoryStruct.comp
          (CategoryTheory.Functor.LaxMonoidal.μ G (F.obj x)
            (F.obj (CategoryTheory.MonoidalCategoryStruct.tensorObj x_1 x_2)))
          (G.map (CategoryTheory.Functor.LaxMonoidal.μ F x (CategoryTheory.MonoidalCategoryStruct.tensorObj x_1 x_2)))))