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