x+(1)/(x)=3" af "x^(8)+(1)/(x^(8))=?

int (x^(3))/(1+x^(8))dx=

int (x^(3)dx)/(1+x^(8)) =

The expression (1)/(x-1)-(1)/(x+1)-(2)/(x^(2)+1)-(4)/(x^(4)+1) is equal to (8)/(x^(8)+1)( b) (8)/(x^(8)-1)( c) (8)/(x^(7)-1) (d) (8)/(x^(7)+1)

If (x^(2)-1)/(x)=(8)/(3) and x>1; find x^(3)-(1)/(x^(3))

(x^(3))/(sqrt(1-x^(8)))

(x^(3))/(sqrt(1-x^(8)))