| Element | Description | Example |
|---|---|---|
| <mi> | Identifier (variable) | <mi>x</mi> |
| <mn> | Number | <mn>42</mn> |
| <mo> | Operator | <mo>+</mo> |
| <mfrac> | Fraction | <mfrac><mn>1</mn><mn>2</mn></mfrac> |
| <msup> | Superscript | <msup><mi>x</mi><mn>2</mn></msup> |
| <msub> | Subscript | <msub><mi>x</mi><mn>1</mn></msub> |
| <msqrt> | Square root | <msqrt><mi>x</mi></msqrt> |
| <mroot> | Nth root | <mroot><mi>x</mi><mn>3</mn></mroot> |