Answer
See below
Work Step by Step
$$\frac{\frac{1}{x}-\frac{x}{x^{-1}+1}}{\frac{5}{x}}\\ =\frac{1-\frac{x^2}{x^{-1}+1}}{5}\\=\frac{1-\frac{x^3}{x+1}}{5}\\=\frac{(1+x)-x^3}{5(x+1)}$$
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