When writing a note, you may need a character that is not shown on the keyboard. Don’t worry, just find the character that looks the closest to it on the keyboard and hold down on it until the characters suggestion popup shows. Chances are you are going to find what you need to type there.
For example: In order to type the > character, find the = character on the right, just bellow the numeric keyboard, and press long on it to open the character suggestion popup.
The Mathist 