2.3 Variable Expressions #1-16

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3y means 3 ? y

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means k ? 4

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4b - 3 means 4 ? b ? 3

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means 7 ? a ? a

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2d + 9 means 2 ? d ? 9

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means 3 ? a ? a ? 1

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means r ? r ? r

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-8n + 3 means -8 ? n ? 3

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means 2 ? m ? 4

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means 3 ? x ? x ? 1

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a + 4b means a ? 4 ? b

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pq - 3 means p ? q ? 3

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means 6 ? x ? y

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-6 + 3w means -6 ? 3 ? w

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means 2 ? x ? x ? 3 ? y

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means -8 ? a ? 2 ? b ? b