Translation of jaja

I am skipping sentences that are too long just to be sure. For example I just saw this one. Now, please copy this English sentence and place it exactly into a search browser tool. You will see that is has been copied.
Until now I have tried the copy the mode of operation of Mike in class. Even the homework that they gave us do not match the exercise that we tried yesterday. I could not fulfill this task anyway.
If you are spell checking my letters, that would be great. I would then do the same with your letters. Can you please correct this email too? I thank you in advance for helping my Spanish.