E = Euler constant = 2.718281828...
LN10 = natural log of 10 = 2.302...
LN2 = natural log of 2 = 0.693...
PI = 3.141592653589753...
SQRT1_2 = square root of 1/2 = 0.707...
SQRT2 = square root of 2 = 1.4142...
abs()
acos() limit -1 to +1
asin() limit -1 to +1
atan()
atan2(x,y)
ceil() = next integer higher than value
cos()
exp()
floor()
log()
max(a,b)
min(a,b)
pow(x,y) = x to the y power
random() = uniform dist. on (0,1)
round()
sin()
sqrt()
tan()