r= x^24 - x^22 + x^20 - x^18 + x^16 - x^14 + x^12 - x^10 + x^8 - x^6 + x^4 - x^2 + 1 q= (x^28 - 2*x^27 + x^26 + x^2 + 2*x + 1)/ 4 P= x^14 - 2*x^13 + 15*x^12 - 26*x^11 + 89*x^10 - 130*x^9 + 264*x^8 - 312*x^7 + 406*x^6 - 364*x^5 + 301*x^4 - 182*x^3 + 85*x^2 - 26*x + 4 v= x-1/x