2 u 2 v 3 − 3 u 2 v 2 + 3 u 2 v − 2 u 2 + 2 u v 4 − 7 u v 3 + 9 u v 2 − 7 u v + 2 u − 2 v 4 + 3 v 3 − 3 v 2 + 2 v u v 2 {\displaystyle {\frac {2u^{2}v^{3}-3u^{2}v^{2}+3u^{2}v-2u^{2}+2uv^{4}-7uv^{3}+9uv^{2}-7uv+2u-2v^{4}+3v^{3}-3v^{2}+2v}{uv^{2}}}}
