{1.625+2/3·(3/4)/(3/4)·2/3}/(1/2-1/3-1/4+1/6)·12-0.75

{1.625+2/3·(3/4)/(3/4)·2/3}/(1/2-1/3-1/4+1/6)·12-0.75

原式=(13/8+2/3*3/4*4/3*2/3)*12*12/(6-4-3+2)-0.75
=(13*9+4*8)*12*12/(8*9)-0.75
=149-0.75
=148.25