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
  65
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5
  40
    4
  36
6
  86
    3
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7
  34
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8
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9
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    2
  11
10
  29
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11
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   7
12
  79
    9
  70
13
  51
    7
  44
14
  32
    6
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15
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    5
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