lim_{x \to 2} (x^{2} + x) = lim_{x \to 2} x^{2} + lim_{x \to 2} x = 4 + 2 = 6

${\lim\limits_{x \rightarrow 2} (x^2 + x) = \lim\limits_{x \rightarrow 2} x^2 + \lim\limits_{x \rightarrow 2} x = 4 + 2 = 6}$