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(x^20+x^21+x^22+x^23+x^24+x^25+x^26+x^27+x^28+x^29)/(1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12+x^13+x^14+x^15+x^16+x^17+x^18+x^19+x^20+x^21+x^22+x^23+x^24+x^25+x^26+x^27+x^28+x^29)=1/2
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