Question

Find \( f+g, f-g, f g \), and \( f / g \) and their domains. \[ f(x)=x^{2}+7 x, \quad g(x)=5 x^{2}-1 \] Find \( (f+g)(x) \) Find the domain of \( (f+g)(x) \). (Enter your answer using interval notatio