To simplify the expression \((6^{-2} \times 6^5)^{-3}\), we can follow these steps:
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Combine the exponents within the parentheses: \[ 6^{-2} \times 6^5 = 6^{-2 + 5} = 6^{3} \]
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Raise the result to the power of -3: \[ (6^{3})^{-3} = 6^{3 \times -3} = 6^{-9} \]
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Express \(6^{-9}\) in a simplified form: \[ 6^{-9} = \frac{1}{6^9} \]
Thus, the simplified form of the original expression is: \[ \frac{1}{6^9} \]
Therefore, the answer is: \[ \frac{1}{6^{9}} \]