by ChiZ
536674+54673=591347 546812-6578=540234 1176-567+2453*5=13474 677*7-65+546*3=6312 (647+786*2)-546=1673
536674+54673=591347 546812-6578=540234 1176-567+2453*5=13474 677*7-65+546*3=6312 (647+786*2)-546=1673 Less