Rút gọn A = \( \left( \frac{x+2}{x^2+5x+6} + \frac{x+3}{x-2} \right) \cdot \left( \frac{3-x}{x+1} \right) \)

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R/g
A = \( \left( \frac{x+2}{x^2+5x+6} + \frac{x+3}{x-2} \right) \cdot \left( \frac{3-x}{x+1} \right) \)