You claim to know science therefore you are asking a question you should know the answer for.
But then again you are a far left drone that thinks the science is settled!
There is no one equation for the standard BB model of the universe.
It may be better to put it another way: while it is true that when building a theory on another theory, the conclusion of the first theory must be taken as an axiom in the second, but that shouldn't mislead one to be believe that that first theory isn't still a testable scientific theory with evidence of its own to back it up. In addition, the success of the new theory provides evidence to back up the theories its axioms are built from.
But the far left religion will never allow you to consider anything outside your religious dogma.