A special type of this mode is equation mode beginequation. Equation environment is provided by an external package consult the amsmath article. Define equation with LaTeX markup or to jump between brackets and matrix elements.
Snip can convert images into LaTeX for inline equations block mode equations and numbered equations.
The PDF consists of an image layer of a scanned document and a text layer under it as a result of an OCR service such as i2OCR applied to the image layer. And from there you can copy the equation to any format you want. When numbering is allowed you can label each row individually. Backed by popular demand you can now create and edit math equations using LaTeX syntax in Word 2016.