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a³ + b³ = কত?

a^{3} + b^{3} + 3 a^{2} b + 3 a b^{2}

{(a + b)}^{3} - 3 a b (a + b)

{(a + b)}^{3} + 3 a b (a + b)

{(a - b)}^{3} - 3 a b (a - b)

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