− 2 u v 3 − 5 u v 2 + 7 u v − 3 u − 3 v 3 + 7 v 2 − 5 v + 2 u v 3 / 2 {\displaystyle -{\frac {2uv^{3}-5uv^{2}+7uv-3u-3v^{3}+7v^{2}-5v+2}{{\sqrt {u}}v^{3/2}}}}
