$\"\"$ $\"\"$

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The expression is $\"\"$

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$\"\"$ (Rewrite 990 as sum of 900 and 90)

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$\"\"$ (Apply Distributive property: $\"\"$ )

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

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

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

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The value of the expression is 7920.

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