| ^2 | replace x by x2 |
| sqr | replace x by the square root of x |
| 1/x | replace x by its multiplicative inverse 1/x |
| x! | replace x by its factorial x!. If x is not an integer, the gamma function gamma(x-1) is computed |
| abs | replace x by its positive absolute value |
| exp | replace x by ex |
| ln | replace x by its Napier logarithm log(x) |
| int | remove from x the digits after the decimal point, to leave its integer part |
| frac | remove from x the digits before the decimal point, to leave the fractional part |