− u v 5 − 4 u v 4 + 6 u v 3 − 2 u v 2 − 2 v 3 + 6 v 2 − 4 v + 1 u v 5 / 2 {\displaystyle -{\frac {uv^{5}-4uv^{4}+6uv^{3}-2uv^{2}-2v^{3}+6v^{2}-4v+1}{{\sqrt {u}}v^{5/2}}}}
