Find a basis for the span of the vectors

\[ \begin{bmatrix} 2 \\ 0 \\ 4 \end{bmatrix} \qquad \begin{bmatrix} -5 \\ -5 \\ 2 \end{bmatrix} \qquad \begin{bmatrix} -5 \\ 3 \\ -5 \end{bmatrix} \qquad \begin{bmatrix} -10 \\ 12 \\ 0 \end{bmatrix} \qquad .\]

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