| Symbol | Description |
|---|---|
| $ = $ | is equal to |
| $ \neq $ | is not equal to |
| $ \gt $ | is greater than |
| $ \lt $ | is less than |
| $ \ge $ | is greater than or equal to |
| $ \le $ | is less than or equal to |
| $ \not\gt $ | is not greater than |
| $ \not\lt $ | is not less than |
| $ \not\ge $ | is not greater than or equal to |
| $ \not\le $ | is not less than or equal to |
| $ \approx $ | is approximately equal to |
Algebra is the subfield of mathematics that studies algebraic structures and the manipulation of expressions within these structures.