I'm fairly new to Mathematica, and I'm having a problem evaluating anything. Everything was working fine until my Shift key became jammed (I'm not fully posiive if that caused the problem, but it may have) and from that point onward, nothing would evaluate - not even basic arithmetic. I noticed that on the right side, where there are usually only single brackets, there are now yellow double-brackets. Does anyone know how I can fix this? Thank you.