Hello,
Please note that the trial package doesn't include technical support. Please purchase a license to get technical support, remove trial watermarks, use phpdocx on a production server, and get all available features (https://www.phpdocx.com/features).
Using the current stable version of phpdocx, to add math equations as block WordFragments, you need to add them in a paragraph. For example:
$docx = new CreateDocx();
$math = new WordFragment($docx);
$math->addMathEquation(
'<m:oMathPara>
<m:oMath><m:r><m:t>∪±∞=~×</m:t></m:r></m:oMath>
</m:oMathPara>', 'omml'
);
$textMath = new WordFragment($docx);
$textMath->addText([$math]);
$valuesTable = array(
array(
$textMath,
)
);
$docx->addTable($valuesTable);
$docx->createDocx('output');
The next stable release of phpdocx won't have this requirement and adding math equations as block WordFragments will be possible without using an extra paragraph WordFragment.
Regards.