∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] {X Y : Cᵒᵖ} {f : X ⟶ Y}
  [inst_1 : CategoryTheory.Limits.HasPullback f f] [inst_2 : CategoryTheory.Limits.HasPushout f.unop f.unop],
  CategoryTheory.CategoryStruct.comp (CategoryTheory.Iso.refl (Opposite.op (Opposite.unop X))).inv
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.Cofork.ofπ f.unop.op ⋯).π
        (CategoryTheory.Iso.refl (CategoryTheory.Limits.Cofork.ofπ f.unop.op ⋯).pt).hom) =
    (CategoryTheory.Limits.Cofork.ofπ f ⋯).π