(a+2b-3c-d)(a+2b+3c+d)(a+2b-3c-d)(a+2b+3c+d)(1-x-2x^3+3x^2)91-x+2x^3-3x^2)(a^6-3a+9)(a^3+3)(a^2-1)(a^2-a+1)(a^2+a+1)
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