The value of the determinant |\table (a^{x}+a^{-x} )^{2} ,(a^{x}-a^{-x} )^{2},1;(b^{x}+b^{-x} )^{2} ,(b^{x}-b^{-x} )^{2},1;(c^{x}+c^{-x} )^{2} ,(c^{x}-c^{-x} )^{2},1| is