If the LaTeX syntax is not correct or not included in the COMSOL Multiphysics software, the equation preview is empty, but no error appears. Also, for symbols in math mode, surround the LaTeX syntax with $ to indicate that the text inside of the $ signs is LaTeX when used as an annotation text, for example.

The \left and \right commands must be used in pairs to provide flexible delimiters that fit the formula inside. Put the desired delimiter — ( and ), for example — immediately after the \left and \right commands. For example, \left( \frac{x}{y} \right) provides x/y as a fraction within parentheses that fit the expression’s size.

The \makebox command creates a box for the text. In addition to the \makebox{text} syntax, you can also use \makebox[width]{text}, where the width can be \depth, \height, \width, and \totalheight (which is the box’s height plus its depth), or a multiple of those widths. You can also use a width with a unit such as 10em for 10 “M” widths or 20mm for 20 mm width. The \makebox[width][position]{text} syntax provides an optional position of the text within the box: c for centered text (the default), l for flush left, or r for flush right.

The \begin and \end commands must be used in pairs to mark the beginning and end of an environment. The only supported environment is the array. For example, \begin{array}{clcr} 1 & 2 & 3 \\ 4 & 5 & 6\end{array} creates a matrix with 2 rows and three columns.

The \textsuperscript and ^ syntax alternatives are identical for creating superscripts. Likewise, \textsubscript and _ are identical for creating subscripts.