`intdx/(e^x-1)^2`

intdx/(x^3-1)

intdx/(x^2+1)^2

intdx/(x^2+1)^4

intdx/((x+1)^2(x^2+1))

intdx/((x+1)(x^2+2x+2))

intdx/(1+secx)

intdx/((x-1)^(3/4)(x+2)^(5/4))= (A) 4/3((x-1)/(x+2))^(1/4)+c (B) 4/3sqrt((x-1)/(x+2))+c (C) 4/3((x+2)/(x-1))^(1/4)+c (D) none of these

intdx/(x(1+x^2))

Evaluate intdx/(a^2+x^2)

intdx/(x^4-a^4)