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-\frac{2x}{2x^{2}}-\frac{1}{2x^{2}}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x and 2x^{2} is 2x^{2}. Multiply -\frac{1}{x} times \frac{2x}{2x}.
\frac{-2x-1}{2x^{2}}
Since -\frac{2x}{2x^{2}} and \frac{1}{2x^{2}} have the same denominator, subtract them by subtracting their numerators.