Calc
Inductive()
Lemma
NewType()
Proof
QExists()
QForAll()
Struct()
axiom()
cond()
define()
prove()
search()
simp()
comm_norm()
GenericProof
TypeClass
assoc_comm()
assoc_norm()
idem_norm()
>>> x,y = smt.Ints("x y") >>> assert comm_norm(y + x).eq(x + y)
e (ExprRef)
ExprRef