General ⇒ Using latex in forums

[Credo]

Hi
Sometimes I have to write some equations in my posts in a forum which doesn't have tools for writing equations on its side so I should do something at my side. Before, I used Greasemonkey on FireFox with Tex the World script to write equations but after firefox28(or some version near that), greasemonkey is not supported so I can't do that now because I want to be up to date. So now, I have to use this page and write the equation. Then I should copy the image link and put it in the post which is a slow proccess and in no way is can be as good as wrting latex code inside the post. Now I wanna know is there something that I can use?
I have ubuntu 14.04 and firefox now. But I will chanage my browser if needed.
Thanks

[StarValkyrie]

I've had this problem on one other forum site but that one prints all of the code except the \ character which I usually just replace with / and add a note that all of the slashes have to be switched. What characters are you trying to use that aren't working?