r= x^84 - x^70 + x^56 - x^42 + x^28 - x^14 + 1 q= ( x^102 + 2*x^100 + x^98 + x^4 - 2*x^2 + 1 ) / 4 P= x^51 + 2*x^50 + x^49 + x^2 - 2*x + 1 v= x^2