∀ {J : Type u} [inst : CategoryTheory.Category.{v, u} J] {κ : Cardinal.{w}} [hκ : Fact κ.IsRegular]
  [inst_1 : CategoryTheory.IsCardinalFiltered J κ] {K : Type v'} {j j' : J} (f : K → (j ⟶ j')) (hK : HasCardinalLT K κ)
  (k : K) {Z : J} (h : CategoryTheory.IsCardinalFiltered.coeq f hK ⟶ Z),
  CategoryTheory.CategoryStruct.comp (f k)
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.IsCardinalFiltered.coeqHom f hK) h) =
    CategoryTheory.CategoryStruct.comp (CategoryTheory.IsCardinalFiltered.toCoeq f hK) h