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