For real numbers x, y, z such that x \neq y \neq z,|\table x , x^2 , 1+x^3 ; y , y^2 , 1+y^3 ; z , z^2 , 1+z^3|=0 and |\table 1 , x , x^2 ; 1 , y , y^2 ; 1 , z , z^2| \neq 0 then x y z=