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