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Anonymous
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When x=2 and y=3, 3*2*3*2*2=72
(x + y)3 + (x - y)3 = (x3 + 3x2y + 3xy2 + y3) + (x3 - 3x2y + 3xy2 - y3) = 2x3 + 6xy2 = 2x*(x2 + 3y2)
6y-y3 = 3
x3-y3
-y3 + 7y3