While executing this program i am getting Error using symengine Operands are invalid. Error in sym/

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https://www.mathworks.com/matlabcentral/answers/387815-while-executing-this-program-i-am-getting-error-using-symengine-operands-are-invalid-error-in-sym

      
        syms
       
        E
       
        ec=1.6*10^(-19);
       
        del= 1.3*10^(-3)*ec;
       
        k= 1.3807*10^(-23);
       
        T=1.5;
       
        V= linspace(0,5);
       
        i=int((abs(E))/(sqrt(E.^2-del.^2))*(1/(1+exp((E-ec.*V)/(k.*T))-1/(1+exp(E./(k.*T))))), E, -inf, -1*del)
       
        + int((abs(E))/(sqrt(E.^2-del.^2))*(1/(1+exp((E-ec.*V)/(k.*T))-1/(1+exp(E./(k.*T))))), E, del, inf);
       
        plot(V,i);

https://www.mathworks.com/matlabcentral/answers/387815-while-executing-this-program-i-am-getting-error-using-symengine-operands-are-invalid-error-in-sym#comment_562025

https://www.mathworks.com/matlabcentral/answers/387815-while-executing-this-program-i-am-getting-error-using-symengine-operands-are-invalid-error-in-sym#answer_317654

https://www.mathworks.com/matlabcentral/answers/387815-while-executing-this-program-i-am-getting-error-using-symengine-operands-are-invalid-error-in-sym#answer_317655

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