$\"\"$

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The expression is $\"\"$ .

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Rewrite the expression using $\"\"$ , $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ $\"\"$

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(Apply formula: $\"\"$ )

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$\"\"$

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$\"\"$ (Cancel common factors)

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$\"\"$ (Simplify) $\"\"$

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The simplified expression value is $\"\"$ .