[2 - t, 1, 4, 5]
[2, 2 + t, 3, 4]
[1, 4, 11 - t, 6]
I - (2 - t)*III, II - 2*III
[0, 4·t - 7, - t^2 + 13·t - 18, 6·t - 7]
[0, t - 6, 2·t - 19, -8]
(t - 6)*I - (4t - 7)*II
[0, 0, - t^3 + 11·t^2 - 6·t - 25, 6·t^2 - 11·t - 14]
c = (6·t^2 - 11·t - 14) / (- t^3 + 11·t^2 - 6·t - 25)
c = - (6·t^2 - 11·t - 14)/(t^3 - 11·t^2 + 6·t + 25)