2/51 + 1/9+ 3/17 = 23/153 + 3/17 = 50/153
5/12+1/8+2/9 = 7/24 + 2/9 = 37/72
2/24 + 4/15 + 6/35 = 7/20+6/35 = 73/140
3/7+ 1/28+11/35= 13/28+11/35=109/140
5/8+1/6+7/12 = 9/24+7/12=23/24
13/30+2/45+1/9 = 43/90+1/9 = 53/90
3/11+9/22+4/55 = 15/22+4/55= 83/110
5/21+8/15+1/7 = 27/35 + 1/7 = 32/35
1/24+11/30+5/12 = 49/120 + 5/12 =33/40