( u − 1 ) ( v − 1 ) 2 ( w − 1 ) 2 ( v w + 1 ) u v 3 / 2 w 3 / 2 {\displaystyle {\frac {(u-1)(v-1)^{2}(w-1)^{2}(vw+1)}{{\sqrt {u}}v^{3/2}w^{3/2}}}}
