问题
计算题
﹣x2[（﹣2xy2）3×y﹣（﹣4xy）2]﹣16x4y2．
答案
解：原式=﹣x2[﹣8x3y7﹣16x2y2]﹣16x4y2．
=8x5y7+16x4y2﹣16x4y2
=8x5y7
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﹣x2[（﹣2xy2）3×y﹣（﹣4xy）2]﹣16x4y2．
解：原式=﹣x2[﹣8x3y7﹣16x2y2]﹣16x4y2．
=8x5y7+16x4y2﹣16x4y2
=8x5y7