(5/6+4/7)-5/12=(70/84+48/84)-35/84=83/8411/12-(1/3+2/5)=55/60-(20/60+24/60)=55/60-44/60=15/60=1/4
(5/6+4/7)-5/12=70/84+48/84-35/84=83/8411/12-(1/3+2/5)=(55-20-24)/60=11/60
