\"\"

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The expression is  \"\".

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

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Find the expression.

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\"\"               (Substitute \"\" and \"\")

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

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

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                  \"\"                                      (Subtraction: \"\")

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                  \"\"                                      (Substitute \"\")

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

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\"\"

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The value of expression \"\" is \"\".