If $$a - \left(\frac{1}{a}\right) = b, b - \left(\frac{1}{b}\right) = c$$ and $$c - \left(\frac{1}{c}\right) = a$$, then what is the value of $$\left(\frac{1}{ab}\right) + \left(\frac{1}{bc}\right) + \left(\frac{1}{ca}\right)$$?
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