-5/8-(-7/12)=...5/9-2=... -7 7/24-4 13/16=...-3 3/14-(-2 5/6)=...

-5/8-(-7/12)=-5/8+7/12=-15/24+14/24=-1/24

5/9-2=5/9-1 9/9=-1 4/9

-7 7/24-4 13/16=-175/24-77/16=-350/48-231/48=-581/48

-3 3/14-(-2 5/6)=-45/14+17/6=-135/42+119/42=-16/42=-8/21