Question 682065
{{{4(y-1)/(5y-8)-(y-4)/(8-5y)-(-5y)/(5y-8)=(4y-4)/(5y-8)+(y-4)/(5y-8)+5y/(5y-8) = (4y-4+y-4+5y)/(5y-8)=(10y-8)/(5y-8)}}}