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