@i8igmac
The way I have always understood it with permutations (where repetition is allowed) you just multiply by the numer of options you have each time. So for the example you mentioned it would be:
10*36*36*36*36*36
which, as it's all multiplication, is the same as 36^5*10 as you suggest
So say you were trying to crack a simple password hash and knew that:
every password issued was 5 characters long
for some reason had the specific pattern, 0-9, 0-9, a-z, A-Z, symbol - same as hashcat's ?s or <space>!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~, and,
repetitions were allowed
the permutations would be 10*10*26*26*33