$a, b,$ and $c$ are real numbers such that $a+x^{2} = 2015$, $b+x^{2}= 2016$, $c+x^{2} = 2017$ and $a b c= 999$. Find $\frac{a}{bc}+\frac{c}{ab}+\frac{b}{ac}-\frac{1}{a}-\frac{1}{b}-\frac{1}{c}$

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