-(-1) + (-7) + (2) - (-4) - (-2)

Answer 1

Remark:

- ( - 1 ) = 1

+ ( - 7 ) = - 7

- ( - 4 ) = 4

- ( - 2 ) = 2
____________

- ( - 1 ) + ( - 7 ) + ( 2 ) - ( - 4 ) - ( - 2 ) =

1 - 7 + 2 + 4 + 2 = 2