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