− u 2 v 3 + 3 u 2 v 2 − 3 u 2 v + u 2 − u v 4 + 5 u v 3 − 9 u v 2 + 5 u v − u + v 4 − 3 v 3 + 3 v 2 − v u v 2 {\displaystyle {\frac {-u^{2}v^{3}+3u^{2}v^{2}-3u^{2}v+u^{2}-uv^{4}+5uv^{3}-9uv^{2}+5uv-u+v^{4}-3v^{3}+3v^{2}-v}{uv^{2}}}}
