Sean Carroll's everyday equation.

[Alex K]

I can tell you all about it and then some. It's a mathematical expression called the "Partition Function" or in quantum field lingo the "generating functional" (written in very short form) that describes the dynamics of the particles and fields of the standard model, as well as spacetime via Einstein's General Relativity.
The Integrals in the front (the big S signs) describe taking the average over all possible ways the fields can change between two moments in time (as quantum things do...) . The <Lambda indicates that we don't have the complete quantum gravity

Edit:it's not quite the generating functional, but almost