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= ( 4782969*x^28 + 1594323*x^26 + 8748*x^14 + 3*x^2 + 1 ) / 4 P= x^7 + x^6 - 7*x^5 - 6*x^4 + 14*x^3 + 9*x^2 - 7*x + 2 v= 3*x^2+1/(3*x^2)