lst=[["(3*x^5-10*x^4+21*x^3-42*x^2+36*x-32)/x/(x^2+1)/(x^2+4)^2","x",1],
["x^2*(B*x^2+A)/(b*x^2+a)^(1/2)/(d*x^2+c)^(3/2)","x",1],
["x^2*(B*x^2+A)/(b*x^2+a)^(1/2)/(-d*x^2+c)^(3/2)","x",1],
["x^2*(B*x^2+A)/(-b*x^2+a)^(1/2)/(d*x^2+c)^(3/2)","x",1],
["x^2*(B*x^2+A)/(-b*x^2+a)^(1/2)/(-d*x^2+c)^(3/2)","x",1],
["x^m*(C*x^3+B*x^2+A)*(a+b*x^n)^p*(c+d*x^n)^q","x",1]]