# Latex question?

The Latex previewer on the Latex thread? It doesn't appear to work properly, I'll admit that I don't know much at all about latex but even when I cut and paste text from say the pdf or the forum directly into the box it comes up with a load of compuspeak and no image? Is there a reason for this so far I've tried $$x^2\sqrt{x}[\tex] and I get no joy, and a few even simpler equations but nothing but error script? Btw I cut and pasted that from the pdf tutorial to make sure I had the format right? Am I beind stupid, is my formatting wrong, or can you not copy and paste latex code from the forum to the test program? Ahhh, I tried adding  signs instead of using the [tex][\tex] tags and it appeared to work; any reason why the tex tags don't work? As in the instructions it says to place tex tags before maths? I've just noticed the math mode as well, maybe I should have played around first. I guess everyone just knows that you don't need to use the format [tex] tags unless your a chump but anyway live and learn... Last edited: ## Answers and Replies I'm no pro at it but when you write: [tex]x^2\sqrt{x}$$
Doesn't the slash need to be forward ( / ) not backwards ( \ )as yours seem to be in the closing tag?
While I'm at it does anyone know the Latex to make a "NOT =" sign?

Last edited:
robphy
Homework Helper
Gold Member
While I'm at it does anyone know the Latex to make a "NOT =" sign?
$$\neq$$ \neq

Thanks,
test on variations of not ; $$\neq$$ \neq

$$\geq$$ \geq
$$\ngeq$$ \geq

$$\leq$$ \leq
$$\nleq$$ \nleq

$$\simeq$$ \simeq
........ \nsimeq ..... is not valid

Last edited:
robphy
Homework Helper
Gold Member
Thanks,
test on variations of not ; $$\neq$$ \neq

$$\geq$$ \geq
$$\ngeq$$ \geq

$$\leq$$ \leq
$$\nleq$$ \nleq

$$\simeq$$ \simeq
........ \nsimeq ..... is not valid
$$\not\eq$$ \not\eq

$$\not\geq$$ \not\geq

$$\not\leq$$ \not\leq

$$\not\simeq$$ \not\simeq

$$\not 5$$ \not 5

I'm no pro at it but when you write:
$$x^2\sqrt{x}$$
Doesn't the slash need to be forward ( / ) not backwards ( \ )as yours seem to be in the closing tag?
While I'm at it does anyone know the Latex to make a "NOT =" sign?
It doesn't like tex tags forward slashed or backwards although point noted.(in the tutorial it's actually that way which is where I copied it from)

It also doesn't use \frac instead it uses the format 1 \over 2.

Last edited:
Gokul43201
Staff Emeritus