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