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d((x+3*x^2+3*x^3+10*x^4)/(1+4*x+x^2+4*x^3+10*x^4)/x)/dx
d((x+3*x^2+3*x^3+10*x^4)/(1+4*x+x^2+4*x^3+10*x^4)/x)/dx
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