Question 1054710
{{{f(x)=x^3}}}
{{{f(x+c)=(x+c)^3=x^3+3cx^2+3cx+c^3}}}
{{{f(x+c)-f(x)=3cx^2+3cx+c^3}}}
{{{(f(x+c)-f(x))/c=3x^2+3x+c^2}}}