An overview of the first stage of the location:

Solution to the math puzzle:

All hints to the code to he room with electricity:
hints

The correct code is: III , I , II , IV

The next section of this location will be a bit tricky. Please clear the side rooms to reveal green checkmarks and red crosses which inform you, which gate opens and which gate closes when you use the lever in that specific room. Please use the levers in such way, that you open all five gate. Please note that the gates do not need to be opened in a specific order.
levers

The following section contains another code!
code hints
The correct code is 5128 😉

A pretty hard section is waiting for you, the puzzle with red and grey numbers. Please keep in mind that the gray is a sum of the red surrounding it. 😉
red grey

The section with many red and blue numbers is one lever harder. The goal is to think of the puzzle in this way: (sum of the red numbers around the spot) - minus (sum of the blue numbers around the spot).
The password to the gate can be found in the previous section. It will disable the tesla towers and you will be able to push the red button to open the gate.
The correct code is Sombrero, Teddy bear, Horseshoe, guitar.
Sobs1

Correct placement of the iron balls in Sobs office.
office

In the hacking part, he principle (sum red) - (sum blue) works as well. Please remember, that the Teddy bear and Guitar represent the same numbers as by the code to Sobs office, Teddy bear : 2, Guitar : 4 .
hack