\"\"\"\"

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The expression is \"\".

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Rearrange the terms using the distributive property: \"\".

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\"\"          (Distribute7)

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\"\"                (Multiply: \"\")

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\"\"                (Apply Commutative property of addition: a + b = b + a)

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\"\"               (Apply distributive property: ab + ac = (b + c)a)

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\"\"                           (Add: 7 + 3 = 10)\"\"

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The simplified expression is \"\"