Let f(x) = -3x^2 + x - 4, g(x) = -5x^2 + 3x - 8, and h(x) = 6^x^2 - 7x - 3. Express f(x) + g(x) + h(x) as a single polynomial, with the terms in order by decreasing degree.
( -3x^2-5x^2 + 6^x^2) + ( x + 3x-7x) + ( -4-8-3) simplify from here
-3x^2 + x - 4
-5x^2 + 3x -8
6x^2 - 7x -3
-2x^2 -3x -15