7•(-5) = -354•(-2) = -87•2 = 146•2 = 123•9 = 186•(-5) = -30
Therefore, the expression simplifies to: -35 - 8 + 14 + 12 - 18 - 30 = -65.
7•(-5) = -35
4•(-2) = -8
7•2 = 14
6•2 = 12
3•9 = 18
6•(-5) = -30
Therefore, the expression simplifies to: -35 - 8 + 14 + 12 - 18 - 30 = -65.