u v 3 − 2 u v 2 + 2 u v − 2 u − 2 v 3 + 2 v 2 − 2 v + 1 u v 3 / 2 {\displaystyle {\frac {uv^{3}-2uv^{2}+2uv-2u-2v^{3}+2v^{2}-2v+1}{{\sqrt {u}}v^{3/2}}}}
