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