Decomposition factor: x2-2xy-8y2-x-14y-6=______ ．

X2-2xy-8y2-x-14y-6 = (x-4y) (x + 2Y) + (2x-8y) - 3x-6y-6 = (x-4y) (x + 2Y) + 2 (x-4y) - 3x-6y-6 = (x-4y) (x + 2Y + 2) - 3 (x + 2Y + 2) = (x-4y-3) (x + 2Y + 2)

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