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1. \(a^3+3a^2+3a+1=\) [ ].
2. \(b^3-3b^2+3b-1=\) [ ].
3. \(125p^3+75p^2q+15pq^2+q^3=(\) [ ] \(+\,q)^3\) .
4. \(24ab^2+8a^3-8b^3-24ba^2=(\) [ ] \()^3\) .