Find the derivative of each of the following functions, first by using the product rule, then by multiplying each function out and finding the derivative of the higher-order polynomial. post both solutions using the canvas equation editor along with explanations of the intermediate steps that demonstrate your understanding of the derivative
1. (4x + 6)(9x-5)
2. 4x^2(3x^3 -2x^2 +5x)
3. (3x^2 -x + 1)(7-x^6)
4. (h^3 -5)(3h^2 -5h - 4)