− u v 5 + 2 u v 4 − 3 u v 3 + u v 2 + v 3 − 3 v 2 + 2 v − 1 u v 5 / 2 {\displaystyle {\frac {-uv^{5}+2uv^{4}-3uv^{3}+uv^{2}+v^{3}-3v^{2}+2v-1}{{\sqrt {u}}v^{5/2}}}}
