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\frac{\left(x^{3}+2x^{2}-x-1\right)x}{x}-\frac{2}{x}
To add or subtract expressions, expand them to make their denominators the same. Multiply x^{3}+2x^{2}-x-1 times \frac{x}{x}.
\frac{\left(x^{3}+2x^{2}-x-1\right)x-2}{x}
Since \frac{\left(x^{3}+2x^{2}-x-1\right)x}{x} and \frac{2}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{x^{4}+2x^{3}-x^{2}-x-2}{x}
Do the multiplications in \left(x^{3}+2x^{2}-x-1\right)x-2.