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x3 + x = x(x2+1)
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x(x^2 + 1)
w3+125
(x + 3)(x^2 - 3x + 9)
2(x^2 + 2)(x + 3)
x3 + 1 = (x + 1)(x2 - x + 1) The x + 1's cancel out, leaving x2 - x + 1
(x + 2)(3x - 1)(3x + 1)