Question 52718
Expand the first polynomial to get {{{-3x^2+6+6-4x^2}}}.  Combining like terms gives us {{{-7x^2+12}}}.  Expanding the 2nd one gives us {{{x^3-3x^2-2x+5-x^2+2x-2}}}, which simplifies to {{{x^3-4x^2+3}}}