∀ (A : Type u₁) [inst : CategoryTheory.Category.{v₁, u₁} A] (B : Type u₂) [inst_1 : CategoryTheory.Category.{v₂, u₂} B]
  (C : Type u₃) [inst_2 : CategoryTheory.Category.{v₃, u₃} C]
  (X : CategoryTheory.Functor A B × CategoryTheory.Functor A C),
  (CategoryTheory.functorProdFunctorEquivUnitIso A B C).hom.app X =
    CategoryTheory.Prod.mkHom (X.1.prod'CompFst X.2).inv (X.1.prod'CompSnd X.2).inv