下列计算错误的是( )
A:(6a+1)(6a-1)=36a2-1
B:(-m-n)(m-n)=n2-m2
C:(a3-8)(-a3+8)=a9-64
D:(-a2+1)(-a2-1)=a4-1
—Take the blue one, as the colour looks good your skin.
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