This is just an idea. I took the reverse of the last part. Does it work?

Taking a reverse of a problem may not prove what I am looking for... It's like saying 2+2=4 so we can assume every 4 is 2+2 if the numbers are the same.They could also be |-2+-2|.

there needs to be more rules:

However, with subnumerics, the rules are different. This may work anyway

you could have 6NVcon-2NV=4NV<=>4ph

But this does not work because NV must first be connected.

if NV is the same as PH then it will work because you can not add, subtract, multiply, and divide any part. You can only connect or disconnect NV.

If the PH hole is a PH hole and not null from a number... The null comes from one and only one PH, which is the same variable type as NV