− u 2 v 3 − 3 u 2 v 2 + 3 u 2 v + 2 u v 4 − 5 u v 3 + 7 u v 2 − 5 u v + 2 u + 3 v 3 − 3 v 2 + v u v 2 {\displaystyle -{\frac {u^{2}v^{3}-3u^{2}v^{2}+3u^{2}v+2uv^{4}-5uv^{3}+7uv^{2}-5uv+2u+3v^{3}-3v^{2}+v}{uv^{2}}}}
