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