`I=int(x)/(x^(4)-x^(2)+1)dx`

I=int(1)/(x^(3)+x^(2)+x+1)dx

Evaluate: (i) int((x^(3) + 4x^(2) -3x -2))/((x+2)) dx , (ii) int((x^(4) +1)/(x^(2) +1))dx

I=int_(0)^(4)(x^(2)+2x+4)dx

I= int (dx)/( x^(2) + x+1)

I=int(1-x^(2))/(x(1-2x))dx

I=int(1)/(x sqrt(x^(4)-1))dx

I= int (dx)/( 4-x^(2) - 4x) .

(i) int((x^(2) - 1)/(x^(2) + 1))dx , (ii) int ((x^(6)- 1)/(x^(2) + 1))dx (iii) int ((x^(4))/(1+x^(2)))dx , (iv) int((x^(2))/(1+x^(2)))dx

(i) int (x^2+1)/((x^2+4)(x^2+25)) dx (ii) int (2x^2+1)/(x^2(x^2+4)) dx