Short multiplication formulas of a third degree

$(a + b)^{3} = a^{3} + 3 a^{2} b + 3 a b^{2} + b^{3}$

$(a - b)^{3} = a^{3} - 3 a^{2} b + 3 a b^{2} + b^{3}$

$(a^{3} + b^{3}) = (a + b) (a^{2} - 2 a b + b^{2})$

$(a^{3} - b^{3}) = (a - b) (a^{2} + 2 a b + b^{2})$

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