If f(x)=2x+3x−5f(x) = \frac{2x+3}{x-5}f(x)=x−52x+3, find f(f(x))f(f(x))f(f(x)).
7x−12x−25\frac{7x-12}{x-25}x−257x−12
7x+183x−13\frac{7x+18}{3x-13}3x−137x+18
xxx
4x+6x−5\frac{4x+6}{x-5}x−54x+6