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

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

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

(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

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

int(2x^(2)(1+2x^(2)))/((1+x^(2)+x^(4))^(2))dx is equal to

int(2x^(2)(1+2x^(2)))/((1+x^(2)+x^(4))^(2))dx is equal to

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

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