Question 962456
Edit: looks like I missed some stuff.
--------------------------------------
If
{{{f(x)=2x^4+x^3+3x^2+3x-5}}}
and
{{{g(x)=3x^4-2x^3+7x^2-5x+2}}}
then
{{{f(x)+g(x)=2x^4+x^3+3x^2+3x-5+3x^4-2x^3+7x^2-5x+2}}}
{{{f(x)+g(x)=5x^4-x^3+10x^2-2x-3}}}
and
{{{f(x)-g(x)=2x^4+x^3+3x^2+3x-5-(3x^4-2x^3+7x^2-5x+2)}}}
{{{f(x)-g(x)=2x^4+x^3+3x^2+3x-5-3x^4+2x^3-7x^2+5x-2}}}
{{{f(x)-g(x)=-x^4+3x^3-4x^2+8x-7}}}