$$\frac{(22-7)!}{9!}$$
$3603600$
$$\frac{15!}{9!}$$
$$\frac{1307674368000}{9!}$$
$$\frac{1307674368000}{362880}$$
$$3603600$$
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$2^{4}\times 3^{2}\times 5^{2}\times 7\times 11\times 13$
