Resposta :
52 ! / (52-4)! 4! = 270 725
52.51.50.49.48! / 48! . 4!
52.51.50.49 / 4 . 3. 2 .1 = 270 725
52.51.50.49.48! / 48! . 4!
52.51.50.49 / 4 . 3. 2 .1 = 270 725