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