2 u 2 v 4 − 5 u 2 v 3 + 6 u 2 v 2 − 4 u 2 v + u 2 − 3 u v 4 + 9 u v 3 − 11 u v 2 + 9 u v − 3 u + v 4 − 4 v 3 + 6 v 2 − 5 v + 2 u v 2 {\displaystyle {\frac {2u^{2}v^{4}-5u^{2}v^{3}+6u^{2}v^{2}-4u^{2}v+u^{2}-3uv^{4}+9uv^{3}-11uv^{2}+9uv-3u+v^{4}-4v^{3}+6v^{2}-5v+2}{uv^{2}}}}
