# Alternative Equation Formats

The equation on this page is available in multiple formats.
Depending on your browser, some formats might not render correctly.

## MathML

${D}_{1}=\sum _{i}({Q}_{i}-1)({Q}_{i}-2)$

## MathML rendered with MathJax

${D}_{1}=\sum _{i}({Q}_{i}-1)({Q}_{i}-2)$

## Math as LaTeX Source

$D_1 =\sum _ i (Q_ i-1)(Q_ i-2)$