뺄셈: 2 - 1
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뺄셈: 2 - 1

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2
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3
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4
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5
  41
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  38
6
  45
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  42
7
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8
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9
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10
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11
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12
  70
    1
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13
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14
  83
    3
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15
  75
    1
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