若a=(-2)²,b=-(-3)³,c=-(-4)²,则-[a-(b+c)]=
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若a=(-2)²,b=-(-3)³,c=-(-4)²,则-[a-(b+c)]=
若a=(-2)²,b=-(-3)³,c=-(-4)²,则-[a-(b+c)]=
若a=(-2)²,b=-(-3)³,c=-(-4)²,则-[a-(b+c)]=
a=(-2)²=4
b=-(-3)³=27
,c=-(-4)²=-16
∴-[a-(b+c)]
=-a+b+c
=-4+27-16
=7