Ответ:
5!/5!=1
7!-5!/5!=7!-1=1*2*3*4*5*6*7-1=5040-1=
=5039
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Ответ:
5!/5!=1
7!-5!/5!=7!-1=1*2*3*4*5*6*7-1=5040-1=
=5039