Find \(x\)!

\(x\) is a positive integer satisfying \(\dfrac{10! + 11! + 12!}{10!} = x^{2}\).

Find the value of \(x\).

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Notation:
\(!\) denotes the factorial notation. For example, \(8! = 1\times2\times3\times\cdots\times8 \).

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