I need to Reset my iphone 4 jailbreak?

So i jailbroke my iphone4 the software is 6.2.2 i jailbroke it with evasi0n those are the specifics
Now, i want to remove my jailbreak. Is it possible to just reset my phone (if so i can't do it directly from my phone because there's a password over the reset settings and my mom set it and she forgot it if you have a fix for that you can answer that too) if i have to delete apps cydia apps i can't i accidentally deleted the cydia app. Now i'm not stupid just alot of bad choices and accidents leading to a problem. Please don't troll i need help bad. (You don't have to explain everything super in depth i somewhat know technology)

Plug it into a computer that has itunes and restore it. It will reset the phone and restore it to working condition.

Plug it into iTunes and do a restore.

There, that wasn't too in depth.

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