lst=[["1/(cos(z)+sin(z)+2^(1/2))","z",1],
["1/((1-x)^(1/2)+(1+x)^(1/2))^2","x",1],
["1/(1+cos(x))^2","x",1],
["sin(x)/(1+x)^(1/2)","x",1],
["1/(cos(x)+sin(x))^6","x",1],
["log(1/x^4+x^4)","x",1],
["log(1+x)/x/(1+(1+x)^(1/2))^(1/2)","x",1],
["log(1+x)*(1+(1+x)^(1/2))^(1/2)/x","x",1],
["1/(1+(x+(x^2+1)^(1/2))^(1/2))","x",1],
["(1+x)^(1/2)/(x+(1+(1+x)^(1/2))^(1/2))","x",1],
["1/(x-(1+(1+x)^(1/2))^(1/2))","x",1],
["x/(x+(1-(1+x)^(1/2))^(1/2))","x",1],
["(x+(1+x)^(1/2))^(1/2)/(x^2+1)/(1+x)^(1/2)","x",1],
["(x+(1+x)^(1/2))^(1/2)/(x^2+1)","x",1],
["(1+x^(1/2)+(1+2*x+2*x^(1/2))^(1/2))^(1/2)","x",1],
["(2^(1/2)+x^(1/2)+(2+2*x+2*2^(1/2)*x^(1/2))^(1/2))^(1/2)","x",1],
["(x+(1+x)^(1/2))^(1/2)/x^2","x",1],
["(1/x+(1+1/x)^(1/2))^(1/2)","x",1],
["(1+exp(-x))^(1/2)/(-exp(-x)+exp(x))","x",1],
["(1+exp(-x))^(1/2)/sinh(x)","x",1],
["1/(cos(x)+cos(3*x))^5","x",1],
["1/(1+cos(x)+sin(x))^2","x",1],
["(1+tanh(4*x))^(1/2)","x",1],
["tanh(x)/(exp(x)+exp(2*x))^(1/2)","x",1],
["(sinh(2*x)/cosh(x))^(1/2)","x",1],
["log(x^2+(-x^2+1)^(1/2))","x",1],
["log(1+exp(x))/(1+exp(2*x))","x",1],
["cosh(x)*log(1+cosh(x)^2)^2","x",1],
["cosh(x)*log(cosh(x)^2+sinh(x))^2","x",1],
["log(x+(1+x)^(1/2))/(x^2+1)","x",1],
["log(x+(1+x)^(1/2))^2/(1+x)^2","x",1],
["log(x+(1+x)^(1/2))/x","x",1],
["atan(2*tan(x))","x",1],
["atan(x)*log(x)/x","x",1],
["atan(x)^2*(x^2+1)^(1/2)","x",1]]