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