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z= s*(log(2*w + 2*(w^2 - a^2)^(1/2)) + atan((w*(1 - a^2)^(1/2)*i)/(w^2 - a^2)^(1/2))*(1 - a^2)^(1/2)*i)
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>> [a,s]=solve(' s*(log(2*1 + 2*(1^2 - a^2)^(1/2)) + atan((1*(1 - a^2)^(1/2)*i)/(1^2 - a^2)^(1/2))*(1 - a^2)^(1/2)*i)=inf',' s*(log(2*(-1) + 2*((-1)^2 - a^2)^(1/2)) + atan(((-1)*(1 - a^2)^(1/2)*i)/((-1)^2 - a^2)^(1/2))*(1 - a^2)^(1/2)*i)=inf','a','s')
Error using solve>processString (line 337)
'  s*(log(2*1 + 2*(1^2 - a^2)^(1/2)) + atan((1*(1 - a^2)^(1/2)*i)/(1^2 - a^2)^(1/2))*(1 - a^2)^(1/2)*i)=inf ' is not a valid expression or equation.
Error in solve>getEqns (line 267)
      eqns = processString(eqns, v, vc);
Error in solve (line 150)
[eqns,vars,options] = getEqns(varargin{:});
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