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