lst=[["1/(x^6-x^3)","x",1],
["(b*x^6+a*x^3)^(11/3)","x",1],
["(b*x^6+a*x^3)^(8/3)","x",1],
["(b*x^6+a*x^3)^(5/3)","x",1],
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["1/(b*x^6+a*x^3)^(1/3)","x",1],
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["(b*x^6+a*x^3)^(4/3)","x",1],
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["1/(b*x^6+a*x^3)^(5/3)","x",1],
["1/(b*x^6+a*x^3)^(8/3)","x",1],
["(a+c/x^2+b/x)^(5/2)","x",1],
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["1/(a+c/x^2+b/x)^(5/2)","x",1],
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["1/(c+a/x^4+b/x^2)","x",1],
["1/(c+a/x^6+b/x^3)","x",1],
["1/(c+a/x^8+b/x^4)","x",1],
["(a+b*x^(1/2)+c*x)^3","x",1],
["(a+b*x^(1/2)+c*x)^2","x",1],
["a+b*x^(1/2)+c*x","x",1],
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["(a+b*x^(1/2)+c*x)^(5/2)","x",1],
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["1/(a+b*x^(1/2)+c*x)^(5/2)","x",1],
["(a^2+2*a*c*x^(1/2)+c^2*x)^3","x",1],
["(a^2+2*a*c*x^(1/2)+c^2*x)^2","x",1],
["a^2+2*a*c*x^(1/2)+c^2*x","x",1],
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["1/(a^2+2*a*c*x^(1/2)+c^2*x)^3","x",1],
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["1/(a^2+2*a*b*x^(1/2)+b^2*x)^(1/2)","x",1],
["(a+b*x^(1/3)+c*x^(2/3))^4","x",1],
["(a+b*x^(1/3)+c*x^(2/3))^3","x",1],
["(a+b*x^(1/3)+c*x^(2/3))^2","x",1],
["1/(a+b*x^(1/3)+c*x^(2/3))","x",1],
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["1/(a^2+2*a*b*x^(1/3)+b^2*x^(2/3))","x",1],
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["1/(a^2+2*a*b*x^(1/4)+b^2*x^(1/2))^(3/2)","x",1],
["1/(a^2+2*a*b*x^(1/6)+b^2*x^(1/3))^(5/2)","x",1],
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["a+b*x^n+c*x^(2*n)","x",1],
["1/(a+b*x^n+c*x^(2*n))","x",1],
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["1/(a^2+2*a*c*x^n+c^2*x^(2*n))^(5/2)","x",1]]