∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {M : Type u_1} [inst_1 : CategoryTheory.Category.{v_1, u_1} M]
  [inst_2 : CategoryTheory.MonoidalCategory M] (F : CategoryTheory.Functor M (CategoryTheory.Functor C C)) {m n m' : M}
  (f : m ⟶ m') (X : C) [inst_3 : F.LaxMonoidal],
  CategoryTheory.CategoryStruct.comp ((F.obj n).map ((F.map f).app X))
      ((CategoryTheory.Functor.LaxMonoidal.μ F m' n).app X) =
    CategoryTheory.CategoryStruct.comp ((CategoryTheory.Functor.LaxMonoidal.μ F m n).app X)
      ((F.map (CategoryTheory.MonoidalCategoryStruct.whiskerRight f n)).app X)