;; rename native functions according to task
(define-syntax-rule (Cnk n k) (Cnp n k))
(define-syntax-rule (Ank n k) (Anp n k))


(Cnk 10 1)
    → 10
(lib 'bigint) ;; no floating point needed : use large integers

(Cnk 100 10)
    → 17310309456440
(Cnk 1000 42)
    → 297242911333923795640059429176065863139989673213703918037987737481286092000
(Ank 10 10)
    → 3628800
(factorial 10)
    → 3628800
(Ank 666 42)
    → 1029024198692120734765388598788124551227594950478035495578451793852872815678512303375588360
1398831219998720000000000000