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How can I get sum of 1,3,5,7,9,11,13,15 is 30

can u use a number any number of times ? how many numbers can be added ?
which operators are allowed : factorial, exponential, logarithm, etc ?
nothing is specified
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i)   3!+1+3+13+7=30              [ If we solve by factorial method]
ii)   3!+3!+3!+3!+3!=30

[without factorial method]
Odd nos added for odd nos. of time will always give an ODD NUMBER.
Odd nos added for even no of time will give an EVEN NUMBER!!
This sum can only be solved through factorial by me.
0 0 0
its not compulsory
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