(assert (= [1 2 (+ 3 4)]
           [1 2 7]))

(assert (= (get [1 2 3] 2)
           3))

(assert (= {1 2 (+ 1 2) 4}
           {1 2 3 4}))

(assert (= (get {1 2 3 4} 3)
           4))