\forall H3:\forall A:Univ.\forall B:Univ.\forall C:Univ.eq Univ (divide (divide identity A) (divide (divide (divide B A) C) B)) C.eq Univ (multiply a b) (multiply b a)
.
intros.
\forall H3:\forall A:Univ.\forall B:Univ.\forall C:Univ.eq Univ (divide (divide identity A) (divide (divide (divide B A) C) B)) C.eq Univ (multiply a b) (multiply b a)