Alternative Equation Formats

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MathML

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

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

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