(show
 (sort2 (union2 '(5 7 2 3 1) '(3 2 4 6 9)))
 (sort2 (intersection2 '(5 7 2 3 1) '(3 2 4 6 9)))
 (sort2 (set_difference '(5 7 2 3 1) '(3 2 4 6 9)))
 (merge2 3 '(1 2 4 5 6))
 (ounion '(1 2 4 5 6) '(2 3 5 7 10))
 (ointersection '(1 2 4 5 6) '(2 3 5 7 10))
 (oset_difference '(1 2 4 5 6) '(2 3 5 7 10))
 (sort2 '(5 7 2 3 1))
 (occur 'C '((A . B) C (B . E) (A . B)))
 (num_occur 'B '((A . B) C (B . E) (A . B)))
 (sort2 (nodups '((2 . 2) . (3 . 5))))
 (multiplicity '((2 . 2) . (3 . 5)))
 (multi_occur_sexpr '((A . B) C (B . E) (A . B)) '(A . B))
 (multi_occur_sexpr '((A . B) C (B . E)) '(A . B))
 )