2 u v 3 − 8 u v 2 + 9 u v − 4 u − 4 v 3 + 9 v 2 − 8 v + 2 u v 3 / 2 {\displaystyle {\frac {2uv^{3}-8uv^{2}+9uv-4u-4v^{3}+9v^{2}-8v+2}{{\sqrt {u}}v^{3/2}}}}
