(x2 - xy + y2)(x + y)
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x6 - y6 = (x3)2 - (y3)2 = (x3 + y3) (x3 - y3) = (x + y)(x2 - xy + y2)(x - y)(x2 + xy + y2)
x3 + x2 - 3x - 3 x(x2 + x - 3) - 3
(x + 7)(x2 - 7x + 49)
If that's 2x2, the answer is (x + 2)(x2 + 4)
x3-343