# Find $$x$$!

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

Find the value of $$x$$.

 

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

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