z^7 - 3 z^6 + 5 z^5 - 9 z^4 + 11 z^3 - 13 z^2 + 8 z - 4 where z=w-1z^7 - 3 z^6 + 5 z^5 - 9 z^4 + 11 z^3 - 13 z^2 + 8 z - 4 where z=w-1

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