5/9+13/27=28/27, 5/12+1/60 =13/30
3/8+5/24=7/12, 9/17-19/68 =5/17
5/12-13/72=17/72, 9/10+4/15=7/6
3/5-1/7=16/35, 4/15-11/60=1/12
5/9+13/27=28/27, 5/12+1/60 =13/30
3/8+5/24=7/12, 9/17-19/68 =5/17
5/12-13/72=17/72, 9/10+4/15=7/6
3/5-1/7=16/35, 4/15-11/60=1/12