Exponentiation symbol in a batch file.

Hi!
In the batch file for a process, if I set incoming momentum to be
p1: 1e-2

everything works normal. But if I write,

p1: 10**(-2)
or
p1: 10^(-2)

the code runs but the distributions are nonsensical.

So what should be the symbol for power?

At the end I am trying to scan over particle momentum in the logspace. So I need something like this:

p1: 10**(-7 + 5*r/4)
p2: 1e-8

Run parameter: r
Run begin: 0
Run step size: 1
Run n steps: 5

So the p1 is scanned from 1e-7 to 1e-2 in 5 steps.

Any help would be appreciated.