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