" 11."int(x^(2)+3)/(x^(2)+1)dx

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

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

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

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

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

Evaluate : (i) int(3x^(2))/((1+x^(6)))dx (ii) int(x^(3))/((x^(2)+1)^(3))dx (iii) (x^(8))/((1-x^(3))^(1//3))dx

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

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

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