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I have been trying to get this equation to work in my LaTeX document, I do not really see any issues with it so if somebody could give some guidance that would be really helpful.

Code:

Thank youCode (Text):\begin{equation}

{\bf{R}} = \sum_{i=1}^{N}_{{\bf{u}}_{i}}

\end{equation}

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# Cannot compile equation in LaTeX- Help with code please!

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