y = 8x\(^3\) - 3x\(^2\) + 7x - 1 \(\frac{\mathrm d^2 y}{\mathrm d x^2} = \frac{\mathrm d}{\mathrm d x} (\frac{\mathrm d y}{\mathrm d x})\) = \(\frac{\mathrm d}{\mathrm d x} (24x^2 - 6x + 7)\) \(\frac{\mathrm d^2 y}{\mathrm d x^2} = 48x - 6\)