You can
put this solution on YOUR website!
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This just expresses a general rule, namely

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You can see it easier with simpler numbers

Or, writing it the long way:

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and

You can see that this is the cube root of

if you just cube it, and then apply the general rule above

So, the given expression must be the cube root of

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So, always refer back to the general rules,
and they apply in all cases.