5/6+11/14=(35+33)/42=34/215/6-4/9-1/3=(15-8-6)/18=1/184/5-4/11+1/5-7/11=03/4+6/13+7/13-1/4=3/21/7+3/5+2/5+5/7=13/71-2/15-11/15-2/15=0
