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