2 u 2 v 3 − 6 u 2 v 2 + 5 u 2 v − u 2 + u v 4 − 8 u v 3 + 15 u v 2 − 8 u v + u − v 4 + 5 v 3 − 6 v 2 + 2 v u v 2 {\displaystyle {\frac {2u^{2}v^{3}-6u^{2}v^{2}+5u^{2}v-u^{2}+uv^{4}-8uv^{3}+15uv^{2}-8uv+u-v^{4}+5v^{3}-6v^{2}+2v}{uv^{2}}}}
