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