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

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

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

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

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

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

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

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

int(2x^(2)+3)sqrt(x+2)dx( ii) int(x^(2)+3x+1)/((x+1)^(2))dx