Б) 75,15 / 2,5 - (18 2/7 - 7 3/25) * 2,5 + 4,07 = 30,06 - (128/7 - 178/25) * 2,5 - 4,07 = 30,06 - (3200 /175 - 1246/175) * 25/10 - 4,07 = 30,06 - (1954/175) * 25/10 - 4,07 = 30,06 - 4,07 - 974/35 =25,99 - 974/35 = 2599/100 - 974 /35 =
18193/700 -19480/700 = - 1287/700 = - 1 587/700