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