$\"\"$

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The expression is $\"\"$

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

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

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

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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The value of the expression is 7.

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