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