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