EXP function pushed on the stack the Euler’s number
e raised to the power of a DOUBLE value x consumed from the top of the stack then subtracts one, i.e. ex-1.
Since 2.6.0, this function can be applied to a list of numeric values. In this case, the function is applied to each element of the list thus returning a list.
Since 2.7.1, this function can be also applied to a GTS. In this case, the function is applied to each value of the given GTS, returning a new GTS.