Logarithms & Roots

Square & Cubed Root

Function	Name	Behaviour
sqrt()	Square Root	Returns the square root of a number (also √)
cbrt()	Cube Root	Returns the cube root of a number

sqrt(16)                                 | 4
cbrt(343)                                | 7

square root of 81                        | 9 
cube root of 27                          | 3

Nth root

root 5 of 100                            | 2.5118864315

Logarithms

Function	Name	Behaviour
exp()	Exponential	Calculates the value of e to the power of x, where e is the base of the natural logarithm. exp(1) returns Euler's number.
ln()	Natural logarithm	The natural logarithm of a number is its logarithm to the base of the mathematical constant e.
log2()	Base 2 logarithm	Calculate the base 2 logarithm of a value
log(), log10()	Base 10 logarithm	Calculate the base 10 logarithm of a value

Log to any base

log 20 base 4                            | 2.1609640474

You can also use more natural phrases for this operation:

81 is 9 to what power                    | 2
27 is 3 to the what                      | 3

Factorial & Absolute Value

Function	Name	Behaviour
abs()	Absolute value	Returns the absolute value of a number (i.e makes a negative number positive)
fact()	Factorial	Returns the factorial of a given number.