− ( u v + 1 ) ( u 2 v 4 − 2 u 2 v 3 + 2 u 2 v 2 + u v 3 − 2 u v 2 + u v + 2 v 2 − 2 v + 1 ) u 3 / 2 v 5 / 2 {\displaystyle -{\frac {(uv+1)\left(u^{2}v^{4}-2u^{2}v^{3}+2u^{2}v^{2}+uv^{3}-2uv^{2}+uv+2v^{2}-2v+1\right)}{u^{3/2}v^{5/2}}}}
