∀ (C : Type u_2) [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  (X : CategoryTheory.EndMonoidal (CategoryTheory.MonoidalSingleObj.star C)),
  (CategoryTheory.MonoidalCategoryStruct.leftUnitor
        ((CategoryTheory.MonoidalSingleObj.endMonoidalStarFunctor C).obj X)).hom =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight
        (CategoryTheory.Iso.refl (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)).hom
        ((CategoryTheory.MonoidalSingleObj.endMonoidalStarFunctor C).obj X))
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.Iso.refl
            (CategoryTheory.MonoidalCategoryStruct.tensorObj
              ((CategoryTheory.MonoidalSingleObj.endMonoidalStarFunctor C).obj
                (CategoryTheory.MonoidalCategoryStruct.tensorUnit
                  (CategoryTheory.EndMonoidal (CategoryTheory.MonoidalSingleObj.star C))))
              ((CategoryTheory.MonoidalSingleObj.endMonoidalStarFunctor C).obj X))).hom
        ((CategoryTheory.MonoidalSingleObj.endMonoidalStarFunctor C).map
          (CategoryTheory.MonoidalCategoryStruct.leftUnitor X).hom))