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