r= x^24 + x^22 - x^18 - x^16 + x^12 - x^8 - x^6 + x^2 + 1 q= (x^46 + 2*x^44 + x^42 + x^4 - 2*x^2 + 1) / 4 P= x^23 + 2*x^22 + x^21 + x^2 - 2*x + 1 v= x^2