(iii) `int(e^(x)-1)/(1-e^(-x))dx`

Evaluate: (i) intx\ e^x^2\ dx (ii) int(e^(2x))/(1+e^x)\ dx

(i) int(e^(x))/(1+e^(x))dx" "(ii) int (e^(x)) /((1+e^(x))^(4))dx

int(e^x)/((1+e^x)(2+e^x))dx

int(1)/(e^(-x)) dx

Evaluate the following: (i) int(sec^(2)x)/(3+tanx)dx " (ii) " int(e^(x)-e^(-x))/(e^(x)+e^(-x))dx (iii) int(1-tanx)/(1+tanx)dx " (iv) " int(1)/(1+e^(-x))dx

(i) int (e^(x) .(1-x))/(x^(2))dx (ii) int ((1+sin x)/(1+cos x))e^(x) dx

int(1)/(e^(x)+1)dx

inte^x/((1+e^x)(e+e^x))dx

Evaluate: int(e^(3x))/(e^(3x)+1)dx

The value of the integral int_(-a)^(a)(e^(x))/(1+e^(x))dx is