If f(x)=5+5x+3x2\displaystyle {f{{\left({x}\right)}}}={5}+{\frac{{{5}}}{{{x}}}}+{\frac{{{3}}}{{{x}^{{2}}}}}, find f(x)\displaystyle {f}'{\left({x}\right)}.
 

Find f(3)\displaystyle {f}'{\left({3}\right)}.