(cons 1 (cons 2 (cons (+ 1 2) '())))
(1 2 3)
(list 1 2 (+ 1 2))
(quote (1 2 (+ 1 2)))
(1 2 (+ 1 2))
'(1 2 (+ 1 2))
(quasiquote (1 2 (unquote (+ 1 2))))
`(1 2 ,(+ 1 2))