Squares:

sq ( x -- y )

sqrt ( x -- y )

Exponential and natural logarithm:

e^ ( x -- e^x )

cis ( arg -- z )

log ( x -- y )

Other logarithms:

log1+ ( x -- y )

log10 ( x -- y )

logn ( x n -- y )

Raising a number to a power:

^ ( x y -- x^y )

e^ ( x -- e^x )

10^ ( x -- 10^x )

Logistics functions:

sigmoid ( x -- y )

Finding the root of a number:

nth-root ( n x -- y )

Converting between rectangular and polar form:

abs ( x -- y )

absq ( x -- y )

arg ( z -- arg )

>polar ( z -- abs arg )

polar> ( abs arg -- z )