[tex]u(x)-w(x)=x^2-1-(x^2-2x+3)=x^2-1-x^2+2x-3=2x-4\\\\\\u(x)*w(x)=(x^2-1)(x^2-2x+3)=x^4-2x^3+3x^2-x^2+2x-3=\\\\=x^4-2x^3+2x^2+2x-3[/tex]
[tex]u(x)-w(x)=2x^2-1-(3x^3-x^2)=2x^2-1-3x^3+x^2=-3x^3+3x^2-1\\\\\\u(x)*w(x)=(2x^2-1)(3x^3-x^2)=6x^5-2x^4-3x^3+x^2[/tex]