Question 860854
f(x) =x -1, h(x) = x+3/3

Those are upon rendering, {{{f(x) =x -1}}}, and {{{h(x) = x+3/3}}}.


{{{f(x)+h(x)=(f+h)(x)=x-1+x+3/3=2x-1+1=2x}}};
in short, {{{highlight((f+h)(x)=2x)}}}.


{{{(f+h)(-4)=2(-4)=-8}}}