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