Question

(5x^2 + 9x - 2/x^2 + 12x + 20)(x^2 + 17x + 70/15x - 3)

Answer 1

\[\frac{5x^{2}+9x-2}{x^{2}+12x+20}*\frac{x^{2}+17x+70}{15x-3}\]
Factor the numerators and denominators to see if there are binomials that you can cancel out.
Then multiply the numerators by each other, and then the same for the denominators.

Answer 2

FYI, it simplifies pretty nicely, don't even need to multiply numerators or denominators.