Trying to open MC world then crashes

Ok so when i try to open a minecraft world it crashes. No matter wich world i try to open it crashes. Read the reports for more info. Oh yeah don`t mind the "Is modded: Definitly" Because it was running 3 mods :Forge, Minecraft coder pack, and Forge mod loader i think. I already uninstall the other 20 mods and the same problem.