lst=[["(b*x^3+a)^5","x",1],
["(b*x^3+a)^4","x",1],
["(b*x^3+a)^3","x",1],
["(b*x^3+a)^2","x",1],
["b*x^3+a","x",1],
["1/(b*x^3+a)","x",1],
["1/(b*x^3+a)^2","x",1],
["1/(b*x^3+a)^3","x",1],
["1/(b*x^3+a+1)","x",1],
["1/(-b*x^3+a+1)","x",1],
["1/(b*x^3+a-1)","x",1],
["1/(-b*x^3+a-1)","x",1],
["(b*x^3+a)^(5/2)","x",1],
["(b*x^3+a)^(3/2)","x",1],
["(b*x^3+a)^(1/2)","x",1],
["1/(b*x^3+a)^(1/2)","x",1],
["1/(b*x^3+a)^(3/2)","x",1],
["1/(b*x^3+a)^(5/2)","x",1],
["1/(b*x^3+a)^(7/2)","x",1],
["1/(x^3+1)^(1/2)","x",1],
["1/(-x^3+1)^(1/2)","x",1],
["1/(x^3-1)^(1/2)","x",1],
["1/(-x^3-1)^(1/2)","x",1],
["(b*x^3+a)^(5/3)","x",1],
["(b*x^3+a)^(2/3)","x",1],
["1/(b*x^3+a)^(1/3)","x",1],
["1/(b*x^3+a)^(4/3)","x",1],
["1/(b*x^3+a)^(7/3)","x",1],
["1/(b*x^3+a)^(10/3)","x",1],
["1/(b*x^3+a)^(13/3)","x",1],
["(b*x^3+a)^(4/3)","x",1],
["(b*x^3+a)^(1/3)","x",1],
["1/(b*x^3+a)^(2/3)","x",1],
["1/(b*x^3+a)^(5/3)","x",1],
["1/(-b*x^3+a)^(1/3)","x",1],
["1/(x^3+2)^(1/3)","x",1],
["(b*x^3+a)^(3/4)","x",1],
["(b*x^3+a)^(1/4)","x",1],
["1/(b*x^3+a)^(1/4)","x",1],
["1/(b*x^3+a)^(3/4)","x",1],
["1/(b*x^3+a)^(5/4)","x",1]]