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