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

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

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

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

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

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

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

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