r= x^64 + x^62 - x^58 - x^56 + x^52 + x^50 - x^46 - x^44 + x^40 + x^38 - x^34 - x^32 - x^30 + x^26 + x^24 - x^20 - x^18 + x^14 + x^12 - x^8 - x^6 + x^2 + 1 q= ( x^106 + 2*x^104 + x^102 + x^4 - 2*x^2 + 1 ) / 4 P= x^53 + 2*x^52 + x^51 + x^2 - 2*x + 1 v= x^2