That is solved https://en.wikipedia.org/wiki/Dirac_equation

All the news from the CERN including the Higgs boson include under the hood those transformation or a slightly more modern variant.

The hard part is mixing General Relativity and Quantum Mechanics.

>Find a way to connect quantum maths with special relativity maths Waves hands, and make no mistakes

I think you mean general relativity, connecting quantum mechanics with special relativity is just QFT