∀ {R : Type u_1} {S : Type u_2} [inst : CommRing R] [inst_1 : CommRing S] {T : Type u_3} [inst_2 : CommRing T]
  {f : R →+* S} {g : S →+* T}, f.FormallyUnramified → g.FormallyUnramified → (g.comp f).FormallyUnramified