$\"\"$

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The expression is $\"\"$ .

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

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$\"\"$ (The absolute value of $\"\"$ is 7)

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$\"\"$ (The opposite of $\"\"$ is 7)

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$\"\"$ (The absolute value of 7 is 7)

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$\"\"$ (Subtract: $\"\"$ ) $\"\"$

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The value of the expression is 0.

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