Good evening! Thanks for the answer:) we are using the code from http://www.codecogs.com/latex/embedded.php. So, If I understood you correctly - we don't need the license, because it is a javascript driven version of the Editor and we dont copy the code behind the entire editor directory from CodeCogs.

Please tell me or give me a link: how can I cash equations? Thank you for the help!:)

PS: I hope my English is correct...:)