− 3 v u 4 + u 4 − 5 v 2 u 3 + 11 v u 3 − 5 u 3 + 8 v 2 u 2 − 17 v u 2 + 8 u 2 − 5 v 2 u + 11 v u − 5 u + v 2 − 3 v {\displaystyle -3vu^{4}+u^{4}-5v^{2}u^{3}+11vu^{3}-5u^{3}+8v^{2}u^{2}-17vu^{2}+8u^{2}-5v^{2}u+11vu-5u+v^{2}-3v}