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
  50
    8
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6
  33
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7
  56
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8
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9
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    1
  37
10
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11
  29
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  25
12
  36
    2
  34
13
  88
    2
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14
  72
    4
  68
15
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    7
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