− 4 u v 4 − 6 u v 3 + 6 u v 2 − 5 u v + 2 u + 2 v 5 − 5 v 4 + 6 v 3 − 6 v 2 + 4 v u v 5 / 2 {\displaystyle -{\frac {4uv^{4}-6uv^{3}+6uv^{2}-5uv+2u+2v^{5}-5v^{4}+6v^{3}-6v^{2}+4v}{{\sqrt {u}}v^{5/2}}}}
