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