It should be noted here that that the 2 x 5D universe that started it all did not input any `energy` into the big bang.

The creation, or break up, of the 10 dimensions into our space time and compactified dimensions and mass and gravity was not really a creation of something `new`.

The sum of the universe is still zero.
Simply, the matter is balanced up by gravity and space-time.
-1 + 1 =0

It’s like finding 10 UK pounds in your purse and thinking you`re 10 pounds richer, but you still owe the shop ten pounds for the bag….