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