Simplify \[ \left[\left(p^{-1}+q^{-1}\right)\left(p^{-1}-q^{-1}\right) \div\left(\frac{1}{p^{-1}...
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0Simplify
\[
\left[\left(p^{-1}+q^{-1}\right)\left(p^{-1}-q^{-1}\right) \div\left(\frac{1}{p^{-1}}-\frac{1}{q^{-1}}\right)\left(\frac{1}{p^{-1}}+\frac{1}{q^{-1}}\right)\right](p q)^{2}
\]
(a) \( (p q)^{2} \)
(b) \( -1 \)
(c) \( -(p q)^{-2} \)
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