Captioning equations can be quite tricky, especially when they can include some unusual characters.
Where it is clear and easy to depict, always try to use the equation.
- E.g. ‘One times n plus one minus x’ is ‘x n + 1 – x’ in captions.
- ‘Squared’ – Write as a word. E.g. 42– x2 = 16x2 is ‘4x squared – x squared = 16x squared’ in captions.
- Chemical equations – Use the subscript/superscript in normal case. E.g. ‘H2O’ is ‘H2O’ in captions.