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