− u 2 v 6 − 2 u 2 v 5 + 2 u 2 v 4 − 2 u 2 v 3 + 2 u 2 v 2 + 2 u v 5 − 3 u v 4 + 3 u v 3 − 3 u v 2 + 2 u v + 2 v 4 − 2 v 3 + 2 v 2 − 2 v + 1 u v 3 {\displaystyle -{\frac {u^{2}v^{6}-2u^{2}v^{5}+2u^{2}v^{4}-2u^{2}v^{3}+2u^{2}v^{2}+2uv^{5}-3uv^{4}+3uv^{3}-3uv^{2}+2uv+2v^{4}-2v^{3}+2v^{2}-2v+1}{uv^{3}}}}
