I want to know the formula to solve the six sides of a cube

Do you mean the Rubik's cube? I never did figure out a specific formula, but solved it plenty of times in my teens. The only advise I could give you is, concentrate on getting the corners in their proper place first. After that, the rest was pretty simple.
Also, check out this thread:

https://www.askmehelpdesk.com/games/ruby-cube-game-14260.html

Good luck. Take care. :)