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