2 u v 3 − 6 u v 2 + 7 u v − 4 u − 4 v 3 + 7 v 2 − 6 v + 2 u v 3 / 2 {\displaystyle {\frac {2uv^{3}-6uv^{2}+7uv-4u-4v^{3}+7v^{2}-6v+2}{{\sqrt {u}}v^{3/2}}}}
