− 3 u v 3 − 8 u v 2 + 10 u v − 4 u − 4 v 3 + 10 v 2 − 8 v + 3 u v 3 / 2 {\displaystyle -{\frac {3uv^{3}-8uv^{2}+10uv-4u-4v^{3}+10v^{2}-8v+3}{{\sqrt {u}}v^{3/2}}}}