[-2, 2, -2, 0, 2]
[-2, 2, 2, -2, 4]
[2, -2, 0, 1, -3]
[-6, 6, -4, -1, 7]
[0, 0, 2, -1, 1]
II - I ; III + I ; IV - 3*I ; V
[0, 0, 4, -2, 2]
[0, 0, -2, 1, -1]
[0, 0, 2, -1, 1]
[0, 0, 2, -1, 1]
II + 0.5*I ; III - 0.5*I ; IV - 0.5*I
[0, 0, 0, 0, 0]
[0, 0, 0, 0, 0]
[0, 0, 0, 0, 0]
Also
[-2, 2, -2, 0, 2]
[0, 0, 4, -2, 2]
[0, 0, 0, 0, 0]
[0, 0, 0, 0, 0]
[0, 0, 0, 0, 0]