> (+ 1 2 3 4 5)
15
> (+)
0
> (append '(1 2 3) '(4 5 6) '(7 8 9))
(1 2 3 4 5 6 7 8 9)
> (max 1 5 7 8 1)
8
> ((lambda (x y) (+ x x y)) 1 2)
4
> ((lambda (x y) (+ x x y)) 1)
[image] [image] #<procedure>: arity mismatch;
 the expected number of arguments does not match the given number
  expected: 2
  given: 1
> (maximum 1 2)
2
> (maximum 2 1)
1
> (maximum)
[image] [image] maximum: arity mismatch;
 the expected number of arguments does not match the given number
  expected: at least 1
  given: 0
> (maximum 1)
[image] [image] mcdr: contract violation
  expected: mpair?
  given: ()
> (maximum 1)
1
> (maximum 1 2 3)
3
> (maximum 1 2 3 1 5 2)
5
> (map list '(1 2 3) '(4 5 6) '(7 8 9))
((1 4 7) (2 5 8) (3 6 9))
> (foldr1 + '(1 2 3 4 5))
15
> (apply + '(1 2 3 4 5))
15
> (foldr1 append '((1 2 3) (4 5 6) (7 8 9)))
(1 2 3 4 5 6 7 8 9)
> (apply append '((1 2 3) (4 5 6) (7 8 9)))
(1 2 3 4 5 6 7 8 9)
> (apply + '(1 2 3 4 5 (6 7 8)))
[image] [image] +: contract violation
  expected: number?
  given: (6 7 8)
  argument position: 6th
> (foldr1 snoc '(1 2 3 4 5))
[image] [image] mcar: contract violation
  expected: mpair?
  given: 5
> (foldr cons '() '(1 2 3 4))
[image] [image] foldr: undefined;
 cannot reference an identifier before its definition
> (foldr cons '() '(1 2 3 4))
(1 2 3 4)
> (apply list '(1 2 3 4))
(1 2 3 4)
> (append '() '(1 2 3) '(4 5 6))
> (append '() '(1 2 3) '(4 5 6))
[image] [image] application: not a procedure;
 expected a procedure that can be applied to arguments
  given: #f
> (append '() '(1 2 3) '(4 5 6))
error
> (append '(1 2 3) '(4 5 6) '(7 8 9)) --> 
> (append '() '(1 2 3) '(4 5 6))
[image] [image] mcons: arity mismatch;
 the expected number of arguments does not match the given number
  expected: 2
  given: 1
> (append '() '(1 2 3) '(4 5 6))
[image] Interactions disabled; out of memory
> (append '((1 2 3) (4 5 6)))
[image] Interactions disabled; out of memory
> append
#<procedure:mappend>
> (append '((1 2 3) (4 5 6)))
((1 2 3) (4 5 6))
> (append '(1 2 3) (4 5 6))
[image] [image] application: not a procedure;
 expected a procedure that can be applied to arguments
  given: 4
> (area 0 0 3 0 0 -4)
> (append '(1 2 3) '(4 5 6))
(1 2 3 4 5 6)
> (append '(1 2 3) '(4 5 6) '(7 8 9))
(1 2 3 4 5 6 7 8 9)
> (append '(1 2 3))
(1 2 3)
> (append)
()
> (apply + '(1 2 3 4 5))
15
> (apply + 1 2 '(3 4 5))
15
> (apply + (cons 1 (cons 2 '(3 4 5))))
15
> (apply + (cons 2 '(3 4 5)))
14
> (apply + 2 '(3 4 5))
14
> (append '(1 2 3) '(4 5 6) '(7 8 9))
(1 2 3 4 5 6 7 8 9)
> (append '(1 2 3))
(1 2 3)
> (apply apply + '(1 2 3 4))
[image] [image] mcar: contract violation
  expected: mpair?
  given: 4
> (apply apply + '((1 2 3 4)))
10
> (apply + '(1 2 3 4))
10
> (apply apply apply + '(((1 2 3 4))))
10
> (apply append '((1 2 3) (4 5 6)))
(1 2 3 4 5 6)
> (apply maximum '(1 4 6 9))
9
> (apply f x y)
[image] [image] f: undefined;
 cannot reference an identifier before its definition
> (apply f (list x y))
[image] [image] f: undefined;
 cannot reference an identifier before its definition
> (f x y)
> (evali 10)
10
> 10
10
> (define 

> a
2
> (evali a)
2
> (id a)
2
> 'a
a
> (id 'a)
a
> (evali 'a)
2
> ''a
'a
> (id ''a)
'a
> (evali ''a)
a
> (evali (list '+ 5 7 a))
14
> (evali (list '+ 5 7 'a))
14
> b
[image] [image] b: undefined;
 cannot reference an identifier before its definition
> (evali (list 'define 'b 5))
> b
5
> (apply + '(1 2 3)) --> (+ 1 2 3)
> (apply + '(1 2 3))
6