HI
My name is Patt Emmawat.
I use Tex Filter but I don't know to code to use in math symbol
example \Bigsum to $$\Bigsum$$
But I dont' know another sysbol
Please Help Me.
Here you'll find a great text in Dutch. May be not verry usefull to you, but skip the Dutch and at the end of the pdf-file, you'll find a refferencetable wich might help you a little further.
Aftherall, math is a universal language
\Bigsum
Proof