Let \(f(x)\) be a polynomial and \(g(x)=f'(x)\) be its derivative. If the…

Let \(f(x)\) be a polynomial and \(g(x)=f'(x)\) be its derivative. If the degree of \((f(x)+f(-x))\) is 10, then the degree of \((g(x) - g(-x))\) is ________ .