What is an expression of 2, 3, 5, and 8 to = 104 using the numbers only once but you can repeat the operations?

Ok, let's see here. You have the numbers: 2 3 5 and 8 in order to get 104. You can only use each number once so adding the numbers together won't get you anywhere so let's try P.E.M.D.A.S

I got the operation of 8 x (5 x 2 + 3)

Now following the Order of operations you can tell that you need to do what in the () first.

So that is: (5 x 2 + 3) = ( 15 + 3 ) = 8 x 13

Now we just multiply that by 8: 8 x 13 = 104

There you are