List('lambda,List('x),List('+,List('*,'x,'x),1))
(lambda (x) (+ (* x x) 1))

(    '(1 2 3)) = List(1,2,3)
(car '(1 2 3)) = 1
(cdr '(1 2 3)) = List(2,3)
(null? '(2 3)) = 0
(null?    '()) = 1

faculty(10) = 3628800
faculty(10) = 3628800
foobar = List(a,bc,def,z)