Accent Office Math structure, which consists of a base element and a combining diacritical mark.

Bar Office Math structure, which consists of a base element and an overbar or underbar.

Border box Office Math structure, which consists of a border drawn around a base element.

Box Office Math structure, which is used to group components of an equation or other instance of mathematical text.

Delimiter Office Math structure, which consists of opening and closing delimiters characters, and one or more elements contained inside with a designated separator character between each element.

Equation Office Math structure, which consists of one or more equations or expressions elements.

Fraction Office Math structure, which consists of a numerator element and denominator element separated by a fraction bar.

Function Office Math structure, which consists of a function name element and an argument element acted upon.

Group Character Office Math structure, which consists of a character drawn above or below base element.

Lower-Limit Office Math structure, which consists of a base element on the baseline and reduced-size limit element immediately below it.

Upper-Limit Office Math structure, which consists of a base element on the baseline and reduced-size limit element immediately above it.

Matrix Office Math structure, which consists of one or more elements laid out in one or more rows and one or more columns.

N-ary Office Math structure, which consists of an n-ary operator character, a base element (or operand), and optional upper and lower limit elements.

Phantom Office Math structure.

This structure has two primary uses: adding the spacing of the phantom base element without displaying that base; and suppressing part of the glyph for spacing considerations.

Pre-sub-superscript Office Math structure, which consists of a base element, a reduced-size script element placed below and to the left, and a reduced-size script element placed above and to the left.

Radical Office Math structure, which consists of a radical character, a base element, and an optional degree element.

Sub-superscript Office Math structure which consists of a base element, a reduced-size script element placed below and to the right, and a reduced-size script element placed above and to the right.

Subscript Office Math structure which consists of a base element and a reduced-size script element placed below and to the right.

Superscript Office Math structure which consists of a base element and a reduced-size script element placed above and to the right.