Question 1068293
{{{f(x)=x^3+x^2+x+1 }}}
{{{-f(x)=-x^3-x^2-x-1 }}}
{{{f(-x)=-x^3+x^2-x+1}}}
Neither because,
{{{f(-x)<>-f(x)}}} 
and 
{{{f(-x)<>f(x)}}}