\"\"\"\"

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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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\"\"    (Distributive property: \"\")

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\"\"             (Multiply: \"\")

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\"\"

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

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

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\"\"                    (Add: 18 + 18 = 36) \ \

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\"\"

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The simplified expression is \"\".