Can you help me with a brain teaser i having trouble with a couple heres one?

*Given two 2s, plus can be changed to times without chaning the result: 2 + 2= 2 x 2. The solution is easy too: 1+2+3 = 1x 2 x 3. Now find the anwser for 4 numbers and the answer(s) for 5 numbers.*