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  • 8_1=?
    7
  • 2+3=?
    5
  • 9-8=?
    1
  • 5-5=?
    0
  • 6-4=?
    2
  • 5+8=?
    13
  • 8_1=?
    7
  • 9+1=?
    10
  • 5+5=?
    10
  • 3-1=?
    2
  • 1+4=?
    5
  • 9+7=?
    16
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