$\"\"$

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The expression is $\"\"$

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Apply Distributive property: a (b – c) = ab – ac.

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$\"\"$ (Distribute –7) $\"\"$

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$\"\"$ (Product of two same signs is positive)

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

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

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The solution of $\"\"$ .