Question

()+()++)=30
use nu 1 .3.5.7.9.11.13.15

Answer 1

Odd numbers don't add up to give you an even number.
It is possible only in case of factorial.

3!+1+3+13+7=30 

3!+3!+3!+3!+3!=30

11+1+3+15=30

3! + 15 + 9 = 30

Answer 2

this case  possible only with factorial 
3!+15+9 =30