$$5 x f ( x + \frac { 2 } { x } ) ^ { 6 } - \frac { 10 x + 14 x } { x } + 6 x + 8 x + 6 x$$
$\frac{5f\left(x^{2}+2\right)^{6}}{x^{5}}+20x-24$
$5fx^{7}+60fx^{5}+300fx^{3}+800fx+20x+\frac{1200f}{x}-24+\frac{960f}{x^{3}}+\frac{320f}{x^{5}}$
