`int(x^2)/(4+x^2)dx=?`

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

int(2x)/(4-3x-x^2)dx=

int(x^(2))/(4x^(2)-9)dx

int(x^(2))/(9+4x^(2))dx

int(x^2)/(x^4+5x^2+6)dx=

If the integral I=int(2x^(2))/(4+x^(2))dx=2x-f(x)+c , where f(2)=pi , then the minimum value of y=f(x)AA x in [-2, 2] is (where, c is the constant of integration)

int(2x^4+5)/(x^2+1)dx

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

Evaluate: int(x^2)/(x^4-x^2-12)\ dx

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