A³-8b³-64c³-24abc = a³+(-2b)³+(-4c)³-3*a*-2b*-4c = (a-2b-4c)(a²+(-2b)²+(-4c)²(-2*a*-2b)(-2*-2b*-4c)(-2*a*-4c)) = (a-2b-4c)(a²+4b²+16c²+4ab-8bc+8ac)
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