Here's the list in MD2.2 The ones that start with underscore are just internal equivalents to syntactical stuff like / or *

- if

band

bor

loop

while

bnot

equal

_noteq

below

above

_beleq

_aboeq

assign

_mod

_mulop

_divop

_orop

_andop

_addop

_subop

_modop

sin

cos

tan

asin

acos

atan

atan2

sqr

sqrt

pow

sigmoid

_powop

exp

log

log10

abs

min

max

sign

rand

floor(Sameasint)

int

ceil

invsqrt

megabuf

gmegabuf

freembuf

memcpy

memset