Alternative Equation Formats

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MathML

η_{i} = {(1 - α)}^{i - 1} y_{1} + \sum_{k = 2}^{i} α {(1 - α)}^{i - k} y_{k}

$\eta _ i = (1-\alpha )^{i - 1}y_1 + \sum _{k = 2}^ i\alpha (1 - \alpha )^{i-k}y_ k$