5x - (2x - 3y) = 5x - 2x + 3y = 3x + 3y
4x + 2 + (-x - 1) = 4x - x + 2 - 1 = 3x + 1
0.1c - 0.4c^2 - (0.1c - 0.5c^2) = 0.1c - 0.4c^2 - 0.1c + 0.5c^2 = -0.4c^2 + 0.5c^2 = 0.1c^2
17a + 12b - 14c - (11a - 10b - 14c) = 17a + 12b - 14c - 11a + 10b + 14c = 6a + 22b
5x - (2x - 3y) = 5x - 2x + 3y = 3x + 3y
4x + 2 + (-x - 1) = 4x - x + 2 - 1 = 3x + 1
0.1c - 0.4c^2 - (0.1c - 0.5c^2) = 0.1c - 0.4c^2 - 0.1c + 0.5c^2 = -0.4c^2 + 0.5c^2 = 0.1c^2
17a + 12b - 14c - (11a - 10b - 14c) = 17a + 12b - 14c - 11a + 10b + 14c = 6a + 22b