Equation Editor Installation instructions on Phpbb3

Hello thank you for this post. All works fine for me. But I want to work around a limitation.

Suppose I post a matrix in my bulletin board using the tex tag, it seems that I have to write the LaTex code with no newline; if not any newline will leave a "br /" (between <> here) in my equation. This problem does not appear when you use the equation editor since it removes the newlines before it copies into the document. But it would be usefull to be able to push return in the code to make it more easy to write.

Thanks in advance for any help.