( t ( 1 ) − 1 ) ( t ( 2 ) − 1 ) ( t ( 3 ) − 1 ) ( t ( 4 ) − 1 ) t ( 1 ) t ( 2 ) t ( 3 ) t ( 4 ) {\displaystyle {\frac {(t(1)-1)(t(2)-1)(t(3)-1)(t(4)-1)}{{\sqrt {t(1)}}{\sqrt {t(2)}}{\sqrt {t(3)}}{\sqrt {t(4)}}}}}
