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k^{3}+9k^{2}+27k+27
Usar teorema binomial \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} para expandir \left(k+3\right)^{3}.
k^{3}+9k^{2}+27k+27
Usar teorema binomial \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} para expandir \left(k+3\right)^{3}.