Using two regulators to create new ground: How do I calculate needed power?
Do not figure it out, junk it.  Current cannot flow from the plus 5 to the ground because these 3 terminal regulators do not sink current.  In rare cases it can work if the -5 draw is always greater or equal to the +5 draw.  Look for voltage splitting circuits.  A common approach is to use an amplifier to force the ground to ground, at low currents even an op amp can do this.