Question 35384
{{{(5^-1+x^-1)/(x^-2+25^-1)}}}
Since the exponents are -, you need to switch the terms around, the ones in numerator put in denominator and vice verse, and make the exponents positive;
{{{(x^2+25^1)/(5^1+x^1)}}}
Now you need to factor the numerator:
{{{(x+5)(x-5)/(x+5)}}}
Now factor;
{{{cartoon(
  (x+5)(x-5)/(x+5),
  highlight((x+5))*(x-5)/highlight((x+5)), 
  cross((x-5))*(x+5)/cross((x+5)), highlight( (x-5))
)}}}
Hope you understand
=)