Factor
\frac{n\left(10n+1\right)}{2}
Evaluate
\frac{n\left(10n+1\right)}{2}
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\frac{n+10n^{2}}{2}
Factor out \frac{1}{2}.
n\left(1+10n\right)
Consider n+10n^{2}. Factor out n.
\frac{n\left(10n+1\right)}{2}
Rewrite the complete factored expression.
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