(1)[-2的2次方+(-2)的3次方]-(-2)×(-3)=[-4-8]-6=-12-6=-18(2)[19+(-8×2+3的2次方)]÷(-12)=[19+(-16+9)]÷(-12)=[19-7]÷(-12)=12÷(-12)=-1(3)-3-[-5-0.2÷4/5×(-2)的2次方]=-3-[-5-1/4×4]=-2-[-5-1]=-2+6=4