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

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

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

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

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

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

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

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