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$\"\"$

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The expression is $\"\"$

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If $\"\"$

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Associative property of multiplication: a(bc) =(ab)c)

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$\"\"$ (The product of two same signs is positive)

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$

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The value is $\"\"$ .

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