Alternative Equation Formats

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MathML

σ_{i} σ_{j} [ρ 1 (i \neq j) + 1 (i = j)]

σ_{i} σ_{j} [ρ 1 (i \neq j) + 1 (i = j)]

$\sigma _{i}\sigma _{j}[\rho 1(i \neq j)+ 1(i=j)]$