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