Okay, it now works. So again, if you want to give it a fair judge. Try out how this looks with little bit changed chatjax script: http://jsfiddle.net/4cqVD/13/
ˊx^2+y_1+z_12^34ˊ
ˊexp(2pi*i/3)ˊ
ˊsin^-1(x)ˊ
ˊ<= => -> >=ˊ
ˊ(a,b]={x in RR | a <= x <= b}ˊ