Thank you very much for your help.
We didn"t write good the tex commans.
Now we understand that it should be 6^{7^7}.
I have a problem with the multilang in mobile can you help us with this?
We didn"t write good the tex commans.
Now we understand that it should be 6^{7^7}.
I have a problem with the multilang in mobile can you help us with this?