Пошаговое объяснение:
1) (19/4-19/8*59/9):779/50=(19/4-1121/72)*50/779=(342-1121/72)*50/779=-779/72*50/779=-1/72*50=-1/36*25=-25/36
2) 43/8*(-432/215)+(24/5-72/7):384/175=-43/8*432/215-192/35*175/384=-54/5-192/35*175/384=-54/5-192*5/384=-54/5-5/2=-133/10=-13.3
