MathDisplay APP
2) You can learn how to write formulas by examining the syntax section.
3) Auto delimiter uses [('' ',' `')] as delimiter. You can also use any asciimath delimiter by disabling this option.
4) When the Auto delimiter option is active, use the $ sign to switch to the new line, while inactive, you must set it to your preferred asciimath signification.
5) If the display is broken while writing the formula, press the refresh button, it will be corrected.