Question 8 - Math: Calculator Practice Test for the SAT Exam

For what value(s) of x is the following expression undefined: \(\frac{x^2 - x - 6}{x^2 + 5x + 4} \div \frac{x^2 + x - 2}{x^2 + 2x - 8} - \frac{x + 5}{x + 1}\)

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