From profit/cost models to the flight of a baseball to approximating the motion of a wave, polynomials are a mathematical way to represent values which are sums of powers of variables.

Which of the following is the correct expansion of \( (x+4)(x^2+3) ? \)

What is the sum of all the coefficients in the expansion of the expression \[(x-2y)(9x-6y-8)?\]

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