$\"\"$

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The logarithmic expression is $\"\"$ .

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$\"\"$ (Apply product property: $\"\"$ )

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$\"\"$

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$\"\"$

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$\"\"$

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Apply power property of common logarithm: $\"\"$ .

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$\"\"$

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= 4(1) (The value of $\"\"$ )

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= 4.

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$\"\"$

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The exact value of $\"\"$ is 4.