∀ (C : Type u_1) [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  (x x_1 x_2 : C),
  (((CategoryTheory.BraidedCategory.ofBifunctor.Forward.firstMap₃ C).app x).app x_1).app x_2 =
    (CategoryTheory.MonoidalCategoryStruct.associator x_1 x_2 x).hom