3/8+1/5-2/8+1/3+2/5 9/11+1/9-3/11+1/4+7/9

3/8+1/5-2/8+1/3+2/5=1/8+3/5+1/3 9/11+1/9-3/11+1/4+7/9=6/11+8/9+1/4