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["x*(2*x^2-9*x+9)/((-3+x)*x)^(1/3)","x",1],
["(h*x+g)/(-c*g^2/h^2+9*c*x^2)^(1/3)/(3*h^2*x^2+g^2)","x",1],
["(h*x+g)/(1/9*(2*b^2*h^2+b*c*g*h-c^2*g^2)/c/h^2+b*x+c*x^2)^(1/3)/(f*(b^2-1/3*(2*b^2*h^2+b*c*g*h-c^2*g^2)/h^2)/c^2+b*f*x/c+f*x^2)","x",1]]