int(dx)/(x^(4)+x^(2)+1)

Evaluate int(dx)/(x^(4)(x^(3)+1)^(2))

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

If int (dx)/(x ^(4) (1+x^(2)))=a ln |(1+x ^(3))/(x ^(3))| +(b)/(x ^(3)) +(c)/(1+ x^(2)) +d. then (where d is arbitrary constant)

Let u=int_(0)^(oo)(dx)/(x^(4)+7x^(2)+1) and v=int_(0)^(x)(x^(2)dx)/(x^(4)+7x^(2)+1) then

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

Evaluate: int (x^2dx)/(x^4-x^2+1) .

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

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

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

int(1)/(x^(2)(x^(4)+1)^((3)/(4)))dx