1 9/26(13,3-9 5/6):(-1/2)+14=1 9/26* 3 7/15:(-1/2)+14=4 2/3:(-1/2)+14=-9 1/3+14=4 2/3
13,3-9 5/6=13 3/10- 9 5/6=133/10 - 59/6= 798/60-590/60=208/60=3 28/60=3 7/15
1 9/26* 3 7/15=35/26*52/15=14/3=4 2/3
4 2/3:(-1/2)=14/3:(-1/2)=-28/3=-9 1/3
-9 1/3+14=-28/3+14/1=-28/3+42/3=14/3=4 2/3