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1
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The expression  is equivalent to
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2
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The expression  is equivalent to
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3
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Which expression is not equivalent to  ?
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4
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The expression  is equivalent to
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5
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If  ,  equals
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6
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If  , then  equals
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7
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If  , then  is equal to
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8
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The expression  is equivalent to
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9
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If  , which expression is equivalent to  ?
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10
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If  , then  is equivalent to
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11
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The expression  is equivalent to
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12
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If  , which expression is equivalent to  ?
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13
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If  , then  is equal to
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14
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 is equal to
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15
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The expression  is equivalent to
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16
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 is equivalent to
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17
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The expression  is equivalent to
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18
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The expression  is equivalent to
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19
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The expression  is equivalent to
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20
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The expression  is equivalent to
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21
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If  , then  can be represented by
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22
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The equation  is equivalent to
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23
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The expression  is equivalent to
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24
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If  , then  expressed in terms of  is equivalent to
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25
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 is equivalent to
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