> (cons 1 (cons 2 (cons 3 ())))
#%app: missing procedure expression;
 probably originally (), which is an illegal empty application in: (#%app)
> (cons 1 (cons 2 (cons 3 '())))
(1 2 3)
> '(1 . (2 . (3 . ())))
(1 2 3)
> '(1 . 2)
(1 . 2)
> '(1 . (2 . ()))
(1 2)
> '(1 . (2 . (3 . 4)))
(1 2 3 . 4)
> (1 2 3)
application: not a procedure;
 expected a procedure that can be applied to arguments
  given: 1
> '(1 2 3)
(1 2 3)
> (1 (+ 2 3) (- 4 5))
application: not a procedure;
 expected a procedure that can be applied to arguments
  given: 1
> '(1 (+ 2 3) (- 4 5))
(1 (+ 2 3) (- 4 5))
> (list 1 (+ 2 3) (- 4 5))
(1 5 -1)
> (list 1)
(1)
> (list)
()
> (cdr (list 1 2 3))
(2 3)
> (cadr (list 1 2 3))
2
> (caadr (list 1 2 3))
mcar: contract violation
  expected: mpair?
  given: 2
> (caddr (list 1 2 3))
3
> (length l)
5
> (append '(1 2 3) '(4 5 6) '(7 8 9))
(1 2 3 4 5 6 7 8 9)
> (append '(1 2 3) '(4 5 6))
(1 2 3 4 5 6)
> (append '(1 2 3) '(4 5 6))
(1 2 3 4 5 6)
> (reverse l)
(5 4 3 2 1)
> (reverse l)
(((((() . 5) . 4) . 3) . 2) . 1)
> (reverse l)
(((((() 5) 4) 3) 2) 1)
> (reverse l)
(5 4 3 2 1)
> (list-tail l 3)
(4 5)
> (list-tail l 3)
(4 5)
> (list-tail l 10)
mcdr: contract violation
  expected: mpair?
  given: ()
> (list-ref l 3)
4
> (list-ref l 3)
4
> (member 2 l)
#t
> (member 20 l)
mcar: contract violation
  expected: mpair?
  given: ()
> (member 20 l)
#f
> (member 2 l)
#t