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1. If \(\left(y - \frac{1}{y} \right)^3 = 27\), then find the value of \(y^3 - \frac{1}{y^3}\).
Answer:
\(y^3 - \frac{1}{y^3} =\)
2. If \(2x - 3y - 4z = 0\), then find \(8x^3 - 27y^3 - 64z^3\).
Answer:
\(8x^3 - 27y^3 - 64z^3 =\)
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