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