4- (41/84- 5/21)+ 7 11/30
4-(41/84-5/21)+7 11/30=4-(41/84-20/84)+7 11/30=4-21/84+7 11/30=4-1/4+7 11/30=3 3/4+7 11/30=3 45/60+7 22/60=10 67/60=11 7/60