lst:=[[cos(x)^4/(I+cot(x)),x,1],
[cos(x)^3/(I+cot(x)),x,1],
[cos(x)^2/(I+cot(x)),x,1],
[cos(x)/(I+cot(x)),x,1],
[sec(x)/(I+cot(x)),x,1],
[sec(x)^2/(I+cot(x)),x,1],
[sec(x)^3/(I+cot(x)),x,1],
[sec(x)^4/(I+cot(x)),x,1],
[sec(x)^5/(I+cot(x)),x,1],
[sec(x)^6/(I+cot(x)),x,1],
[cos(x)^3/(a+b*cot(x)),x,1],
[cos(x)/(a+b*cot(x)),x,1],
[sec(x)/(a+b*cot(x)),x,1],
[sec(x)^3/(a+b*cot(x)),x,1],
[sec(x)^5/(a+b*cot(x)),x,1],
[cos(x)^4/(a+b*cot(x)),x,1],
[cos(x)^2/(a+b*cot(x)),x,1],
[sec(x)^2/(a+b*cot(x)),x,1],
[sec(x)^4/(a+b*cot(x)),x,1],
[sec(x)^6/(a+b*cot(x)),x,1],
[sec(x)/(1+2*cot(x)),x,1]]