问题199: 计算以下极限

$$ \begin{aligned} & \lim _{x \rightarrow 2} \frac{2 x^2+7 x-3}{6 x+7} \\ = & \frac{2 \cdot 2^2+7 \cdot 2-3}{6 \cdot 2+7} \\ = & \frac{19}{19} \\ = & 1 \end{aligned} $$

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