− ( t ( 1 ) − 1 ) ( t ( 3 ) − 1 ) 2 ( t ( 3 ) 3 + t ( 2 ) ) t ( 1 ) t ( 2 ) t ( 3 ) 5 / 2 {\displaystyle -{\frac {(t(1)-1)(t(3)-1)^{2}\left(t(3)^{3}+t(2)\right)}{{\sqrt {t(1)}}{\sqrt {t(2)}}t(3)^{5/2}}}}
