− 6 u v 2 − 7 u v + 2 u + 2 v 3 − 7 v 2 + 6 v u v 3 / 2 {\displaystyle -{\frac {6uv^{2}-7uv+2u+2v^{3}-7v^{2}+6v}{{\sqrt {u}}v^{3/2}}}}
