a = [0, 6, 0], b = [-2, 4, 4], c = [7, 5, 6] und A = [1, 2, -2]
B = A + a = [1, 2, -2] + [0, 6, 0] = [1, 8, -2]
C = B + b = [1, 8, -2] + [-2, 4, 4] = [-1, 12, 2]
D = C - a = [-1, 12, 2] - [0, 6, 0] = [-1, 6, 2]
E = C + c = [-1, 12, 2] + [7, 5, 6] = [6, 17, 8]
Aber schau dir mal eure Definitionen genau an. Das was dort heraus kommt sieht schon merkwürdig aus: