\"\"

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The expression is \"\".

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Apply commutative property of addition: a + b = b + a.

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\"\"

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Combine like terms using distributive property: ab + ac = a(b + c).

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\"\"

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\"\"            (Subtract: \"\")

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\"\"                   (Add: 6 + 7 = 13) \"\"

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The simplified expression is \"\".