UPSKILL MATH PLUS

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(i) If \(x + y = 14\) and \(xy = 4\), then the value of \(x^3 + y^3\) is .
 
(ii) If \(a + \frac{1}{a} = 4\), then the value of \(a^3 + \frac{1}{a^3}\) is .