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(2+b)³= 8+12b(do2)+6b(do 2)+b³
(3a+1)³= 27a³+27a(do2)+9ab(do2)+b³
(m+5)³=m³+15m(do2)+75m+125
(n-2a)³=n³-6an(do2)+12a(do2)n-8a(do2)
(3x+5y)³=27x³+135x(do2)y+225xy(do2)+125y³
(x-4y)³=x³-12x³y+48xy(do2)-64y³