Can someone convert this POSIX regex to a Lua regex?

[Linus Sjögren <thelinx@...>]

Here's the regex in question:

'^(?:(?:ceil|abs|floor|mod|exp|log|pow|sqrt|acos|asin|atan|cos|sin|tan|deg|rad|random)\\(|pi|\\(|\\)|-|\\+|\\*|/|\\d|\\.|\\^|\\x2C| )+$'

Thanks in advance...