u 4 ( − v 2 ) − 3 u 3 v 3 + 5 u 3 v 2 − 3 u 3 v − u 2 v 4 + 5 u 2 v 3 − 9 u 2 v 2 + 5 u 2 v − u 2 − 3 u v 3 + 5 u v 2 − 3 u v − v 2 u 2 v 2 {\displaystyle {\frac {u^{4}\left(-v^{2}\right)-3u^{3}v^{3}+5u^{3}v^{2}-3u^{3}v-u^{2}v^{4}+5u^{2}v^{3}-9u^{2}v^{2}+5u^{2}v-u^{2}-3uv^{3}+5uv^{2}-3uv-v^{2}}{u^{2}v^{2}}}}
