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\lim_{x\to2} \frac{x^{2}-4}{x^{2}-3x+2} \cdot \frac{4x^{2}-5x-6}{x^{4}-2x^{2}-3x-2}
\lim_{x\to2} \frac{x^{2}-4}{x^{2}-3x+2} \cdot \frac{4x^{2}-5x-6}{x^{4}-2x^{2}-3x-2}
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