\"\"

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The expression is \"\".

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\"\"                 (Distributive Property: a (b + c) = ab + ac)

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

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

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\"\"                       (Commutative Property: a + b = b + a)

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\"\"

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\"\"                   (Associative Property: (a + b) +c = a + (b + c))

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

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\"\"                              (Add: 12 + 5 = 17)

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\"\"

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The simplified expression is \"\".

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