The following notation can be entered in Show My Work boxes.
Note: In addition to the keyboard shortcuts listed in this topic, some symbols can be typed
using the keyboard shortcuts for your operating system; for example, you can press
ALT+0247 on Windows to type ÷.
| Notation | Keyboard | Button | Notes |
|---|---|---|---|
| Set delimiters (braces) | {a,b | A closing brace is automatically inserted. | |
| Closed interval (brackets) | [a,b | A closing bracket is automatically inserted. | |
| Open interval (parentheses) | (a,b | Symbols >  |
A closing parenthesis is automatically inserted. |
| Empty set | ∅ | ||
| Union | ∪ | ||
| Intersection | ∩ | ||
| Subset | ⊂ | ||
| Superset | ⊃ | ||
| Element of | ∈ | ||
| Not an element of | ∉ |