# Alternative Equation Formats

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

## MathML

${D}_{3}=\sum _{i}({R}_{i}-2)({S}_{i}-2)({Q}_{i}-1)$

## MathML rendered with MathJax

${D}_{3}=\sum _{i}({R}_{i}-2)({S}_{i}-2)({Q}_{i}-1)$

## Math as LaTeX Source

$D_3 =\sum _ i (R_ i-2)(S_ i-2)(Q_ i-1)$