− u v 5 − u v 3 + 2 u v 2 − 2 u v + u + v 5 − 2 v 4 + 2 v 3 − v 2 + 1 u v 5 / 2 {\displaystyle -{\frac {uv^{5}-uv^{3}+2uv^{2}-2uv+u+v^{5}-2v^{4}+2v^{3}-v^{2}+1}{{\sqrt {u}}v^{5/2}}}}
