выполните сложение:2/51+1/9+3/17: 2/21+4/15+6/35: 5/8+1/6+7\12: 3/11+9\22+4/55: 1/24+11/30+5/12,
5/12+1/18+2/9,3/7+/1/28+11/35,13/30+2/45+1/9,5/21+8/15+1/7
5/12+1/18+2/9,3/7+/1/28+11/35,13/30+2/45+1/9,5/21+8/15+1/7
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2/21+4/15+6/35=10/105+28/105+18/105=66/105=22/35
5/8+1/6+7/12=30/48+8/48+28/48=66/48=11/8=1 3/8
3/11+9/22+4/55=30/110+45/110+8/110=83/110
1/24+11/30+5/12=5/120+44/120+50/120=99/120=33/40
5/12+1/18+2/9=15/36+2/36+8/36=25/36
3/7+1/28+11/35=60/140+5/140+44/140=109/140
13/30+2/45+1/9=39/90+4/90+10/90=54/90=6/10=3/5
5/21+8/15+1/7=25/105+56/105+15/105=96/105=32/35