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Simplify : ...

Question

Simplify :
$(- 5)^{4} + (2)^{3}$

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Solution

$(- 5)^{4} + (2)^{3}$

$= (- 5) (- 5) (- 5) (- 5) + (2) (2) (2)$

$= 625 + 8$

$= 633$

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(\frac{4 + \sqrt{5}}{4 - \sqrt{5}} + \frac{4 - \sqrt{5}}{4 + \sqrt{5}})

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