뺄셈: 2 - 1
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뺄셈: 2 - 1

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2
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3
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5
  49
    1
  48
6
  31
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  27
7
  46
    1
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8
  89
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9
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  90
10
  86
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11
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  50
12
  20
    4
  16
13
  27
    5
  22
14
  22
    3
  19
15
  57
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