Odpowiedź :
1 - [x - [- (x - 1) - x - (1 - x) + x]] - (x - 1) = 1 - [x - [-x + 1 - x - 1 + x + x]] - x + 1 = 1 - [x + x - 1 + x + 1 - x - x] - x + 1 = 1 - x - x + 1 - x - 1 + x + x - x + 1 = -2x + 2
1 - [x - [- (x - 1) - x - (1 - x) + x]] - (x - 1) = 1 - [x - [-x + 1 - x - 1 + x + x]] - x + 1 = 1 - [x + x - 1 + x + 1 - x - x] - x + 1 = 1 - x - x + 1 - x - 1 + x + x - x + 1 = -2x + 2