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