Math Question: What is the limit of (x^3 - 1) / (x^2 - 1) as x approaches 1, using L'Hospital's Rule?
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What is the sum of the first 25 positive integers?
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What is the derivative of f(g(x))^h(x) with respect to x, where f(x) represents a differentiable function, g(x) and h(x) are also differentiable functions?