LaTeX → OMML (AddMath)

AddMath parses a basic LaTeX string and writes Office Math ML. Microsoft Word opens the result as a native equation you can double-click to edit — the same editor as Insert → Equation.

Display math is wrapped in m:oMathPara inside a w:p. Inline math is a sibling of w:r inside the current paragraph.

AddMath

Signature

func (d *Document) AddMath(formula string) *element.Formula
func (c *Container) AddMath(formula string) *Formula
func (p *TextRun) AddMath(formula string) *Formula

Parameters

Name	Type	Description
formula	string	LaTeX subset. Unknown tokens become identifiers so Word still opens the file.

Supported LaTeX

Input	OMML
\frac{a}{b}	m:f (numerator / denominator)
x^{2} / x_{n}	m:sSup / m:sSub
\sqrt{x}	m:rad
(a+b) or \left( ... \right)	m:d
\alpha \pi \times \leq \infty \sum \int	Unicode identifiers

pkg/math

Signature

func ParseLaTeX(src string) (*Math, error)
func WriteOMML(m *Math) ([]byte, error)  // display: m:oMathPara
func WriteOMath(m *Math) ([]byte, error) // inline: m:oMath

Use these when you need the OMML bytes without a Document.

Complete example

package main

import (
	"fmt"
	"log"

	"github.com/yunkeweb/go-word"
	gowordmath "github.com/yunkeweb/go-word/pkg/math"
)

func main() {
	doc := word.New()
	doc.SetDefaultFontName("Calibri")
	doc.SetDefaultAsianFontName("Microsoft YaHei")

	sec := doc.AddSection()
	sec.AddTitle("Office Math (OMML)", 1)
	sec.AddText("Display equations occupy their own paragraph (m:oMathPara).")

	sec.AddText("Fraction:")
	sec.AddMath(`\frac{a}{b}`)
	sec.AddText("Pythagoras:")
	sec.AddMath(`x^{2} + y^{2} = z^{2}`)
	sec.AddText("Nested subscript inside a radical:")
	sec.AddMath(`\sqrt{x_1} + \pi`)
	sec.AddText("Delimiter:")
	sec.AddMath(`\left( x+1 \right)`)

	p := sec.AddTextRun()
	p.AddText("The identity ")
	p.AddMath(`e^{i\pi} + 1 = 0`)
	p.AddText(" sits in the same w:p as the surrounding text.")

	tree, err := gowordmath.ParseLaTeX(`\frac{1}{2}`)
	if err != nil {
		log.Fatal(err)
	}
	omml, err := gowordmath.WriteOMML(tree)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("hand-serialized OMML bytes: %d\n", len(omml))

	if err := doc.Save("omml.docx"); err != nil {
		log.Fatal(err)
	}
}

What Word shows

Each display formula is a centered, editable equation. Double-click \frac{a}{b} and Word opens the linear/professional equation editor with a stacked fraction. The Euler identity stays on one line with the words around it. There is no OLE object and no image fallback.

A two-column academic report that mixes these formulas with SetColumns lives in the v0.8.0 demo.