− 2 u v 3 − 2 u v 2 − u v + 2 u + 2 v 5 − v 4 − 2 v 3 + 2 v 2 u v 5 / 2 {\displaystyle -{\frac {2uv^{3}-2uv^{2}-uv+2u+2v^{5}-v^{4}-2v^{3}+2v^{2}}{{\sqrt {u}}v^{5/2}}}}
