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Theory

$a \cdot a \cdot a = a^{3}$

A number or expression multiplied three times can be written as a cube, that is a power with the exponent

3 .

3 \cdot 3 \cdot 3 x \cdot x \cdot x (a + b) (a + b) (a + b) = 3^{3} = x^{3} = (a + b)^{3}

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