:: Expr
e1 = (App Mul (App Add (Val 1) (Val 50)) (App Sub (Val 25) (Val 10)))
:: Expr
e1 = (App Mul (App Add (Val 1) (Val 50)) (App Sub (Val 25) (Val 10)))
:: Expr
e1 = (App Mul (App Add (Val 1) (Val 50)) (App Sub (Val 25) (Val 10)))