-2的平方除以3分之4减【2²-(1-三分之一乘三分之一)】×12
= -4*3/4-(4-8/9)*12
= -3-(4*12-8/9*12)
= -3-(48-32/3)
= -3-48+32/3
= -51+10又2/3
= -40又1/3