1) (b+2)(b^2-2b+4)-b(b^2-1) = b^3 + 8 - b^3 + b = b + 8;
2) y^3-(y-3)(y^2+3y+9) = y^3 - y^3 + 27 = 27.
1) (b+2)(b^2-2b+4)-b(b^2-1) = b^3 + 8 - b^3 + b = b + 8;
2) y^3-(y-3)(y^2+3y+9) = y^3 - y^3 + 27 = 27.