1. Выполните действия:
А) (82−15)−(10+2)= Б) 8(10+−4)=

2. Вынесите общий множитель за скобки:
А) 8+322 = Б) 56−252 =

3. Решите уравнение:
А) Б) 15−1=3(7−1)−1
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