What is the standard equation of the ellipse with a major axis that stretches horizontally by 6 units and a minor axis that stretches vertically by 4 units?
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What is the result of multiplying the vector [2, 4] by the vector [3, -1]?
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What are the roots of the cubic equation 2x^3 + 5x^2 - 3x + 1 = 0?