What is the derivative of the integral from 0 to x of (t^2 + 1) dt?
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What is the value of 3 raised to the power of 5, multiplied by the square root of 16?
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What are the characteristics of a circle with an equation x^2 + y^2 = r^2? Explain its center, radius, symmetry, and how the equation relates to points on the circle.