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