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