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