12+7,8x(8,1-8,4)
-6-4,5x(5,2-10,6)

12+7.8*8.1-7.8*8.4-6-4.5*5.2-4.5*10.612+63.18-65.52-6-23.4-47.49.66-6-23.4-47.4=-67.14

надо упростить 12+7.8х8.1-7.8х8.412+(63.18-65.52)12+63.18-65.5275.18-65.529.662 пример:-6-4.5х(5.2-10.6)-6-4.5х5.2-4.5х10.6-6-(23.4-47.7)-6-23.4+47.7-29.4+47.718.3