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