Why Does it Crash??

[OfficialZanyman]

I very need help. I am going to delete and get minecraft again, but this is the issue. So, my forge used to work very well. I had about 29 mods loaded for my 1.7.10 version. However for some reason, after some mess up with files, either my game crashes as it is loading block textures or crashes when I open a world. When I try to enter my world, it says, Shutting Down Internal Server. I went back and fixed everything, yet its so messed up. Plzz Help!