If $n$ is the degree of the polynomial $\left[\frac{2}{\sqrt{5x^3+1} - \sqrt{5x^3-1}}\right]^8 + \left[\frac{2}{\sqrt{5x^3+1} + \sqrt{5x^3-1}}\right]^8$ and $m$ is the coefficient of $x^n$ in it, then the ordered pair $(n, m)$ is equal to