user=> (let [x 2]
`(1 x 3))
(1 user/x 3)
user=> (let [x 2]
`(1 ~x 3))
(1 2 3)
user=> `(1 (dec 3) 3)
(1 (clojure.core/dec 3) 3)
user => `(1 ~(dec 3) 3)
(1 2 3)