By the way, I read that many researchers started to do research in the field of developing 3D printers and there are many products developed today.

Hello 3D printing technology is an incredible development. I think that people who have studied 3D printing are incredibly smart people. But sometimes people who are smart and people who know how to do such research are not creative. Therefore, it is difficult for them to make a proposal for research. Therefore, I recommend to people who are creators of the researchers and are not creative people - to buy propositions here - https://paperell.com/research-papers-for-sale - which will help with making an offer for research. With such great offers, researchers can start talking to people about what they have invented.

I also thought that only known equations were used in laboratories. But I read info about the connection of physics and mathematics - https://en.wikipedia.org/wiki/Relationship_between_mathematics_and_physics- and it helped me to understand that people are doing something new in the laboratories and don't use solved equations.