Evaluate
-\frac{x+8}{x^{3}}
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-\frac{x+8}{x^{3}}
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\frac{2x-\left(3x+8\right)}{x^{3}}
Since \frac{2x}{x^{3}} and \frac{3x+8}{x^{3}} have the same denominator, subtract them by subtracting their numerators.
\frac{2x-3x-8}{x^{3}}
Do the multiplications in 2x-\left(3x+8\right).
\frac{-x-8}{x^{3}}
Combine like terms in 2x-3x-8.
\frac{2x-\left(3x+8\right)}{x^{3}}
Since \frac{2x}{x^{3}} and \frac{3x+8}{x^{3}} have the same denominator, subtract them by subtracting their numerators.
\frac{2x-3x-8}{x^{3}}
Do the multiplications in 2x-\left(3x+8\right).
\frac{-x-8}{x^{3}}
Combine like terms in 2x-3x-8.
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