u v 5 − 2 u v 4 − u v 3 + 3 u v 2 − 2 u v − 2 v 4 + 3 v 3 − v 2 − 2 v + 1 u v 5 / 2 {\displaystyle {\frac {uv^{5}-2uv^{4}-uv^{3}+3uv^{2}-2uv-2v^{4}+3v^{3}-v^{2}-2v+1}{{\sqrt {u}}v^{5/2}}}}