4-(41/84-5/21)+7/11 3

4-(41/84-20/84)+7 и 11/30=4-1/4+7 и 11/30=4-1/4+(7*30+11)/30=4-1/4+221/30=4-15/60+442/60=4+427/60=(240+427)/60=667/60= 11 и 7/60

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