2 u v 3 − 7 u v 2 + 9 u v − 5 u − 5 v 3 + 9 v 2 − 7 v + 2 u v 3 / 2 {\displaystyle {\frac {2uv^{3}-7uv^{2}+9uv-5u-5v^{3}+9v^{2}-7v+2}{{\sqrt {u}}v^{3/2}}}}
