7!-5!=5!*6*7-5!=5!(6*7-1)=5!*41=2*3*4*5*41=120*41=4920
24!/20!*4!=20!*21*22*23*24/20!*4!=21*22*23*24/2*3*4=21*22*23=10696
или
24!/20!*4!=20!*21*22*23*24/20!*4!=21*22*23*24*24=6120576
7!-5!=5!*6*7-5!=5!(6*7-1)=5!*41=2*3*4*5*41=120*41=4920
24!/20!*4!=20!*21*22*23*24/20!*4!=21*22*23*24/2*3*4=21*22*23=10696
или
24!/20!*4!=20!*21*22*23*24/20!*4!=21*22*23*24*24=6120576