Question 21440
Is your question:
{{{(25t^2-64s^2)/st)}}}/{{{(5/s-8/t)}}} 
{{{(25t^2-64s^2)/st)}}}/{{{(5(t)/s(t)-8(s)/ts)}}} 
{{{(25t^2-64s^2)/st)}}}/{{{(5t/st-8s/st)}}} 
{{{(25t^2-64s^2)/st)}}}/{{{((5t-8s)/st)}}} 
reciprocal
{{{(25t^2-64s^2)/st)}}}*{{{st/(5t-8s)}}} 
{{{(25t^2-64s^2)/(5t-8s)}}}