` int 1/(e^(-3x)+1) dx`

int (4e^(3x) +1)dx

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

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

Ecaluate 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

Find the integral ,int(4e^(3x)+1)dx

int(e^(x)-1)dx*|x|>1

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

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

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

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