− 4 u v 2 − 6 u v + 3 u + 3 v 3 − 6 v 2 + 4 v u v 3 / 2 {\displaystyle -{\frac {4uv^{2}-6uv+3u+3v^{3}-6v^{2}+4v}{{\sqrt {u}}v^{3/2}}}}
