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  • 6 + (9 – 5)
  • 20 + ( 10 - 9 )
  • (30 + 7) - 10
  • 80 - (2 + 8)
  • 34 - (2 + 2)
  • 25 – (7 + 3)
  • (39 - 29) + 17
  • ( 10 + 2) + 12
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