\"\"

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The expression is \"\".

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The values are \"\" and \"\".

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Find the value of the expression.

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\"\"       (Substitute \"\" and \"\")

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              \"\"             (Addition: \"\")

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              \"\"         (Substitution:\"\")

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             \"\"                 (Multiplication:\"\")

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

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\"\"

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The value of the expression is \"\".