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\frac{\left(x^{3}-1\right)\left(x^{3}+2x\right)}{x}
Express \frac{x^{3}-1}{x}\left(x^{3}+2x\right) as a single fraction.
\frac{x\left(x-1\right)\left(x^{2}+2\right)\left(x^{2}+x+1\right)}{x}
Factor the expressions that are not already factored.
\left(x-1\right)\left(x^{2}+2\right)\left(x^{2}+x+1\right)
Cancel out x in both numerator and denominator.
x^{5}+2x^{3}-x^{2}-2
Expand the expression.
\frac{\left(x^{3}-1\right)\left(x^{3}+2x\right)}{x}
Express \frac{x^{3}-1}{x}\left(x^{3}+2x\right) as a single fraction.
\frac{x\left(x-1\right)\left(x^{2}+2\right)\left(x^{2}+x+1\right)}{x}
Factor the expressions that are not already factored.
\left(x-1\right)\left(x^{2}+2\right)\left(x^{2}+x+1\right)
Cancel out x in both numerator and denominator.
x^{5}+2x^{3}-x^{2}-2
Expand the expression.