− u v 5 − 4 u v 4 + 9 u v 3 − 11 u v 2 + 8 u v − 2 u − 2 v 5 + 8 v 4 − 11 v 3 + 9 v 2 − 4 v + 1 u v 5 / 2 {\displaystyle -{\frac {uv^{5}-4uv^{4}+9uv^{3}-11uv^{2}+8uv-2u-2v^{5}+8v^{4}-11v^{3}+9v^{2}-4v+1}{{\sqrt {u}}v^{5/2}}}}