`int(e^(2x)-1)/(e^(2x)+1)dx` is eual to -

Column I, a) int(e^(2x)-1)/(e^(2x)+1)dx is equal to b) int1/((e^x+e^(-x))^2)dx is equal to c) int(e^(-x))/(1+e^x)dx is equal to d) int1/(sqrt(1-e^(2x)))dx is equal to COLUMN II p) x-log[1+sqrt(1-e^(2x)]+c q) log(e^x+1)-x-e^(-x)+c r) log(e^(2x)+1)-x+c s) -1/(2(e^(2x)+1))+c

The value of int_(log1//2)^(log2)sin{(e^(x)-1)/(e^(x)+1)}dx is equal to

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

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

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

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

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

inte^(2x)/(4sqrt(e^x+1))dx

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

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