# What to do when you can't get Latex formatted correctly?

#### find_the_fun

##### Active member
What should one do when they cannot solve a Latex error? Should the report tool be used to get the attention of a moderator?

Also, can anyone recommend a light weight Latex editor for Windows? It can be quite challenging to type in long and complex equations.

#### MarkFL

Staff member
Re: What to do when can't get Latex formatted correctly?

After seeing the $\LaTeX$ error in your DiffEq topic, and having seen this many times myself, I can safely say that you probably do not have matching opening and closing braces. In my experience, the error has always been on my part, and it just takes going through the code to fix my mistake. I highly recommend using the preview function to make sure your code displays as you intend before submitting your post.

#### Jameson

Staff member
Re: What to do when can't get Latex formatted correctly?

I just wrote out a super long post where I tried to generalize approaching syntax with levels or layers in mind, but I think that idea is easy enough not to go crazy with examples now.

Start by replacing the trig expressions with A and B and you'll be left with a much easier line to scan. Once you get the form correct for A and B add back in the trig stuff. Once you establish that some step is working properly, you know immediately when you mess up as you work.

You could count opening brackets and closing brackets and hope that adding one or deleting one will even things out but that's a bit too random for me. It's better I think to approach the code in a few pieces so mistakes are never that time-wasting.

#### hxthanh

##### New member
Re: What to do when can't get Latex formatted correctly?

I want show codecogs
by formular
Code:
 $\displaystyle \sum_{k=1}^{n-1}\sin\left(\frac{\left(2\left\lfloor\sqrt{kn}\right\rfloor+1\right)\pi}{2n}\right)=\cot\left(\frac{\pi}{2n}\right)\cos\left(\frac{\pi}{2n}\right)$
but no preview

$\displaystyle \sum_{k=1}^{n-1}\sin\left(\frac{\left(2\left\lfloor\sqrt{kn}\right\rfloor+1\right)\pi}{2n}\right)=\cot\left(\frac{\pi}{2n}\right)\cos\left(\frac{\pi}{2n}\right)$

#### Jameson

Staff member
Re: What to do when can't get Latex formatted correctly?

I want show codecogs
by formular
Code:
 $\displaystyle \sum_{k=1}^{n-1}\sin\left(\frac{\left(2\left\lfloor\sqrt{kn}\right\rfloor+1\right)\pi}{2n}\right)=\cot\left(\frac{\pi}{2n}\right)\cos\left(\frac{\pi}{2n}\right)$
but no preview

$\displaystyle \sum_{k=1}^{n-1}\sin \left(\frac{\left(2\left\lfloor\sqrt{kn} \right\rfloor+1\right)\pi}{2n}\right)=\cot\left( \frac{\pi}{2n} \right)\cos\left(\frac{\pi}{2n}\right)$
You need to add in a space every so often with Mathjax. I added in some random spaces along the way and now it renders fine.

\displaystyle \sum_{k=1}^{n-1}\sin \left(\frac{\left(2\left\lfloor\sqrt{kn} \right\rfloor+1\right)\pi}{2n}\right)=\cot\left( \frac{\pi}{2n} \right)\cos\left(\frac{\pi}{2n}\right)

#### Bacterius

##### Well-known member
MHB Math Helper
Re: What to do when can't get Latex formatted correctly?

You need to add in a space every so often with Mathjax. I added in some random spaces along the way and now it renders fine.

\displaystyle \sum_{k=1}^{n-1}\sin \left(\frac{\left(2\left\lfloor\sqrt{kn} \right\rfloor+1\right)\pi}{2n}\right)=\cot\left( \frac{\pi}{2n} \right)\cos\left(\frac{\pi}{2n}\right)
[JUSTIFY]I kinda feel like you should add spaces in LaTeX code either way, just for the sake of readability.. I know I, like other people, occasionally right-click to see how an equation was written.[/JUSTIFY]