∀ {x x_1 x_2 : TopCommRingCat} (x_3 : x ⟶ x_1) (x_4 : x_1 ⟶ x_2),
  { app := fun X => TopCat.continuousFunctions.map X (CategoryTheory.CategoryStruct.comp x_3 x_4), naturality := ⋯ } =
    { app := fun X => TopCat.continuousFunctions.map X (CategoryTheory.CategoryStruct.comp x_3 x_4), naturality := ⋯ }