In advice, such as that from Sheffield[1], for equations or formulae in Microsoft Word and PowerPoint the inbuilt equation editor should be used. Standard text with superscripts or special characters should not be used (e.g. using superscripts as powers or using the Pi symbol), as they will not be recognised as equations and will be read incorrectly by assistive technologies. However, this is a) awkward, upsets formatting, and b) is incompatible with Ally.