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