Techniques of Differentiation - Second and Higher Derivatives

Find \(\frac{\mathrm{d}^2y}{\mathrm{d}x^2}\) for each of the following

1. \(y = 3x^4 - 5x^3 + 2x^2 - 7x + 1\)
2. \( y = x^3(2x - 1) \)
3. \( y = \frac{4x^2 + 1}{x} \)
4. \( y = \sqrt{x} + \frac{3}{x^2} \)