Alternative Equation Formats

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MathML

S_{j - 1}^{d} = \sum_{l = 1}^{j - 1} X_{l}^{d}

S_{j - 1}^{d} = \sum_{l = 1}^{j - 1} X_{l}^{d}

$S_{j-1}^{d} = \sum _{l=1}^{j-1} X_{l}^{d}$