User Portlet User Portlet

Split? Do you mean that I have to run the code separately?
Dear Naseer, Thank you for the idea. In this case, do I just need type the code after the error? I found a handbook for Mathematica -- Student's Introduction, but I am not sure that is this solution is in that book. Once again, thank you. I will...
Hi. My name is Ain Ariff and I am a new user of Matematica. Maybe senior people that has more experience in using Matematica can help me solving problem that I can't solve later. Thank you!