{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    [inst_1 : CategoryTheory.MonoidalCategory C] →
      (X Y : C) →
        CategoryTheory.MonoidalCategory.tensorLeft (CategoryTheory.MonoidalCategoryStruct.tensorObj X Y) ≅
          (CategoryTheory.MonoidalCategory.tensorLeft Y).comp (CategoryTheory.MonoidalCategory.tensorLeft X)