Math Question: What is the radius of a circle function if its equation is given by x^2 + y^2 = 25?
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Math question: Find the inverse hyperbolic tangent of the square root of 199, multiplied by the hyperbolic sine of 3, minus the hyperbolic cosine of 4.
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Math Question: What is the limit as x approaches 3 of (2x^2 - 3x + 1)?