(n+1)^6−3(n+1)^5+6(n+1)^4−7(n+1)^3+5(n+1)^2−2(n+1)(n+1)^6−3(n+1)^5+6(n+1)^4−7(n+1)^3+5(n+1)^2−2(n+1)

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