− 6 u v 4 − 13 u v 3 + 13 u v 2 − 6 u v + u + v 5 − 6 v 4 + 13 v 3 − 13 v 2 + 6 v u v 5 / 2 {\displaystyle -{\frac {6uv^{4}-13uv^{3}+13uv^{2}-6uv+u+v^{5}-6v^{4}+13v^{3}-13v^{2}+6v}{{\sqrt {u}}v^{5/2}}}}
