− u v 3 − 2 u v + 2 u + 2 v 5 − 2 v 4 + v 2 u v 5 / 2 {\displaystyle -{\frac {uv^{3}-2uv+2u+2v^{5}-2v^{4}+v^{2}}{{\sqrt {u}}v^{5/2}}}}
