`int(x^3)/(x^2+1)^3dx=?`

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

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

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

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

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

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

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

Evaluate (i) int tan^(3/2)x sec^(2)xdx (ii) int(x^(3))/((x^(2)+1)^(3))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_1^3(x^2)/(x^3+1)dx=?