r= x^48 + x^46 - x^42 - x^40 + x^36 + x^34 - x^30 - x^28 + x^24 - x^20 - x^18 + x^14 + x^12 - x^8 - x^6 + x^2 + 1 q= ( x^82 + 2*x^80 + x^78 + x^4 - 2*x^2 + 1 ) / 4 P= x^41 + 2*x^40 + x^39 + x^2 - 2*x + 1 v= x^2