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

int((1+x+x^(2))/( 1+x^(2))) e^(tan^(-1)x) dx is equal to

(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

Evaluate: int_(1)^(2)(1)/((x+1)(x+2))dx( ii) int_(1)^(2)(1)/(x(1+x^(2)))dx

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

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

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

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

int(1+x+x^(2))/(1+x^(2))e^(tan^(-1)x)dx=

5.Evaluate int(x+(1)/(x))(x^(2)+(1)/(x^(2)))dx .