0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方怎么化简

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0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方怎么化简0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方怎么化简0.5a

0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方怎么化简
0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方
怎么化简

0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方怎么化简
0.5a的平方-1/4a+0.125a的立方+1/2a的立方-0.25a-1/8a的立方
=0.5a的平方-0.5a+1/2a的立方