$\"\"$

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The expression is $\"\"$ .

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The value are $\"\"$ , $\"\"$ and $\"\"$ .

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$\"\"$ (Substitute $\"\"$ , $\"\"$ and $\"\"$ )

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$\"\"$ (Cancel common terms)

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$\"\"$ (Simplify)

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Therefore, the value of expression is $\"\"$ .

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$\"\"$

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$\"\"$ .