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