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بسّط
7!5!2!\frac{7!}{5!2!}5!2!7!
21
4
65
7!3!4!\frac{7!}{3!4!}3!4!7!
35
n!(n)!\frac{n!}{\left(n\right)!}(n)!n!
n
1
-1
املأ الفراغ
n!n(n−1)!\frac{n!}{n\left(n-1\right)!}n(n−1)!n!
n(n-1)!
n!(n−1)!\frac{n!}{\left(n-1\right)!}(n−1)!n!
4!2!\frac{4!}{2!}2!4!
12
8
15
4!0!\frac{4!}{0!}0!4!
20
4!
4!1!\frac{4!}{1!}1!4!
4!3!\frac{4!}{3!}3!4!
n!(n−2)!\frac{n!}{\left(n-2\right)!}(n−2)!n!
n(n-1)
إنتهى الإختبار.