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
  42
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6
  54
    4
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7
  36
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8
  43
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9
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10
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11
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12
  59
    9
  50
13
  60
    3
  57
14
  35
    5
  30
15
  54
    1
  53
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