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12+117+112+11-7+1

Full solution

Q. 12+117+112+11-7+1
  1. Add 1212 and 1111: Add 1212 and 1111.\newlineCalculation: 12+11=2312 + 11 = 23
  2. Subtract 77 from result: Subtract 77 from the previous result.\newlineCalculation: 237=1623 - 7 = 16
  3. Add 11 to total: Add 11 to the previous result.\newlineCalculation: 16+1=1716 + 1 = 17