− 5 u v 3 − 9 u v 2 + 6 u v − u − v 3 + 6 v 2 − 9 v + 5 u v 3 / 2 {\displaystyle -{\frac {5uv^{3}-9uv^{2}+6uv-u-v^{3}+6v^{2}-9v+5}{{\sqrt {u}}v^{3/2}}}}
