− 2 u v 4 − 8 u v 3 + 12 u v 2 − 6 u v + u + v 5 − 6 v 4 + 12 v 3 − 8 v 2 + 2 v u v 5 / 2 {\displaystyle -{\frac {2uv^{4}-8uv^{3}+12uv^{2}-6uv+u+v^{5}-6v^{4}+12v^{3}-8v^{2}+2v}{{\sqrt {u}}v^{5/2}}}}
