im not an expert or really that big of a fan when it comes to harry potter but from what i seen with the right people you can bring someone back to life
No you can't, thats on of the biggest rules.
You can prevent someone from dying (the way they prevent Sirius and Buck from dying with time turner), but they will never have died.
You can "see them" with resurrection stone (or with the way harrys wand connected to voldemorts, but thats a particular case i think), but you are the only one who sees them (they aren't really alive).
You can come back as a ghost.
I think the only exception to that rule would be the use of Horcruxes (as illustrated by Voldemort), but even then, he isn't really dead since a part of his soul is protected, he is this weird "sub-human" thingy that lives on the back of quirrels head.
Well, if you think about it death is final, when you die you are dead and that's it, while getting expelled or being seen could've brought long term consecuences
Isn't that literally the whole point of the series? The whole thing starts because some douche is afraid of dying. That's the one lesson that's repeated over and over and over. There are worse things than death. "To a well ordered mind death is but the next great adventure." - Albus Dumbledore - JK Rowling.
You can prevent someone from dying (the way they prevent Sirius and Buck from dying with time turner), but they will never have died.
You can "see them" with resurrection stone (or with the way harrys wand connected to voldemorts, but thats a particular case i think), but you are the only one who sees them (they aren't really alive).
You can come back as a ghost.
I think the only exception to that rule would be the use of Horcruxes (as illustrated by Voldemort), but even then, he isn't really dead since a part of his soul is protected, he is this weird "sub-human" thingy that lives on the back of quirrels head.