sir I got the answer but it took me 30 min to solve I took longer approach to solve this question I did this 1) I took e^x common from denominator 2) take e^(-x) = t, by this I got cubic/quadratic in 't' with limit zero to one 3) then applied partial fraction 4) then got linear/quadratic format and had to even solve that to get answer sir your approach was so simple yet so short and precise, thank you sir you are amazing