=-1 4/5-3 1/7-5 1/5=-1 28/35-3 5/35-5 7/35=-9 40/35=-10 1/7

=24,16-3,9+14,74=35

=-9 4/13-3 5/26+6 4/13=-9 8/26-3 5/26+6 8/26=-6 5/26

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=6,83+8,4-2,13=13,1

=-2/5+8 8/9-9 3/5=-18/45+8 40/45-9 27/45=-1 1/9