Find the second derivative of (x^2-x+1)(x^3-1)
\(\bf (x^2-x+1)(x^3-1)\implies x^5-x^4+x^3-x^2+x-1 \\\\ \cfrac{d}{dx}[x^5-x^4+x^3-x^2+x-1]\to \underline{5x^4-4x^3+3x^2-2x+1} \\\\\cfrac{d}{dx}[5x^4-4x^3+3x^2-2x+1]\to \boxed{?}\)