Alternative Equation Formats

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MathML

S_{2} (x) = \sum_{i = 1}^{n} K_{i} (x) (X_{i} - x)^{2}

S_{2} (x) = \sum_{i = 1}^{n} K_{i} (x) (X_{i} - x)^{2}

\[ S_2(x) = \sum _{i=1}^ n K_ i(x)(X_ i-x)^2 \]