v 3 u 4 − 2 v 2 u 4 + v u 4 − 5 v 3 u 3 + 9 v 2 u 3 − 5 v u 3 + u 3 − v 4 u 2 + 8 v 3 u 2 − 15 v 2 u 2 + 8 v u 2 − u 2 + v 4 u − 5 v 3 u + 9 v 2 u − 5 v u + v 3 − 2 v 2 + v {\displaystyle v^{3}u^{4}-2v^{2}u^{4}+vu^{4}-5v^{3}u^{3}+9v^{2}u^{3}-5vu^{3}+u^{3}-v^{4}u^{2}+8v^{3}u^{2}-15v^{2}u^{2}+8vu^{2}-u^{2}+v^{4}u-5v^{3}u+9v^{2}u-5vu+v^{3}-2v^{2}+v}
