(10 3/10- 8 1/2) (3 3/7- 6 4/5)* 5 5/6 - 3 1/6+3 2/3

-(10 3/10-8 1/2)=-103/10+17/2=-18/10=-9/5=-1 4/5
(3 3/7-6 4/5)*5 5/6=(24/7-34/5)*35/6=-118/35*35/6=-118/6=-59/3=-19 2/3
-3 1/6+3 2/3=-19/6+11/3=3/6=1/2