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