Find f+g, f- g, fg, and f/g and their domains. f(x) = x² + x₁ g(x) = x² Find (f + g)(x). Find the domain of (f + g)(x). (Enter your answer using interval notation.) Find (f g)(x). Find the domain of (f - g)(x). (Enter your answer using interval notation.) Find (fg)(x).

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