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Simplify (x^2-5)(x+5)+25

$(x^{2} - 5) (x + 5) + 25 = (x^{2} - 5) x + (x^{2} - 5) 5 + 25 = (x^{3} - 5 x) + (5 x^{2} - 25) + 25 = x^{3} - 5 x + 5 x^{2} - 25 + 25 = x^{3} - 5 x + 5 x^{2} = x^{3} + 5 x^{2} - 5 x \Rightarrow (x^{2} - 5) (x + 5) + 25 = x^{3} + 5 x^{2} - 5 x$

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