Question 666430
{{{(x^2-25)/(x^3-125)}}}

{{{((x-5)(x+5))/((x-5)(x^2+5x+25))}}} by difference of squares and cubes

{{{(cross((x-5))(x+5))/(cross((x-5))(x^2+5x+25))}}} 

{{{(x+5)/(x^2+5x+25)}}}