Is x^(-2)+5 a polynomial expression? Why or why not?

Thanks for the correction. Answer: No, [tex]x^(^-^2^)+5[/tex] is a polynomial expression because it has a break between numerical exponents. It goes from [tex]0x^1[/tex] to [tex]x^2[/tex], which makes it in the form of [tex] x^{2} [/tex] to [tex]x^0[/tex] which means that it is NOT a polynomial.