Find the equation of a logarithmic function that shifts right by 2 units, stretches vertically by a factor of 4, and passes through the points (-1, -3) and (3, 1).
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Math question: "Factorize the expression 2x^2 + 7x - 15 using factoring formulas."
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Math question: Find the x-intercept of the graph y = -2x + 6.