43/5-2+1/10 3 5/14-1-6/7 2 8/15-(1 3/10+2/5) 4 11/30-2 9/20-1/10

4 3/5-2+1/10=2 6/10+1/10=2 7/10

3 5/14-1-6/7=2 5/14-12/14=1 19/14-12/14=1 7/14=1 1/2

2 8/15-(1 3/10+2/5)=2 16/30-(1 9/30+12/30)=2 16/30-1 21/30=1 46/30-1 21/30=25/30=5/6

4 11/30-2 9/20-1/10=4 22/60-2 27/60-6/60=3 82/60-2 33/60=1 49/60