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4 7/9+7 4/6=4 14/18+7 12/18=11 26/18=12 8/18=12 4/9
12 1/5-4 2/3=12 3/15-4 10/15=7 8/15
1 4/4+9 1/2=2+9 1/2= 11 1/2
1 4/4+8 3/8=2+8 3/8=10 3/8
3i 2/5+4i1/7=3i14/35+4i5/35=7 i 18/35
4 i 7/9+7 i 4/6=4 i 42/54+7 i 36/54=11 i 78/54=12 i 24/54=12 i 4/9
12 i 1/5-4 i 2/3=12 i 3/15-4 i 10/15=7 i 8/15
pierwszego nie rozumiem