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