> (= 'a 'a)
. . =: contract violation
  expected: number?
  given: 'a
> (= 2 (+ 1 1))
#t
> (= 3 (+ 1 1))
#f
> (eq? 'a 'a)
#t
> (equal? 'a 'a)
#t
> (eq? '(a b c) '(a b c))
#f
> (equal? '(a b c) '(a b c))
#t
> (equal? 1 "1")
#f
> (eq? 1 "1")
#f
>