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8

A method using AMS math environments: \begin{align} 5+4+3+2+1&\\ 4+3+2+1&\\ \vdots&\\ 1& \end{align} \begin{align} 5+4+3+2+1&\\ 4+3+2+1&\\ \vdots&\\ 1& \end{align} Multicolumn: \begin{align} 5+4+3+2+1&&5+4+3+2+1\\ 4+3+2+1&&4+3+2+1\\ \vdots&&\vdots\\ 1&&1 \end{align} \begin{align} 5+4+3+2+1&...


8

The site does have a feature to automatically save drafts of posts. They will be displayed again if you navigate to the relevant page. Thus you really need to find the question first. Then there you will find the draft in the answer field. (There should be a saved draft there as you had the page open for a while.) To find the question again I recommend to ...


8

Here is a community answer for purposes of testing. The text from the question posted as a spoiler. ! \begin{array}{| r | r | r | r |} \hline >! \text{Case} & n & n+1 & 2n+1 \\ \hline >! 1 & 2a^2 & 3b^2 & c^2 \\ \hline >! 2 & 2a^2 & b^2 & 3c^2 \\ \hline >! 3 & a^2 & ...


6

The solution (which is not specific to this site, but works more or less everywhere) is to use a version of an 'ad blocker' add-on for your browser. For example, here, though I am in no way endorsing this particular choice.


6

The short is that nobody looked at the post (or maybe somebody looked but nobody took action). Why exactly this was the case is impossible to know. The longer version. First, to be clear, you did take the correct action, which was that you raised a "close" flag. This is the equivalent of voting to close for users that do not yet have that ...


4

One question per post Limit yourself to one question per post (according to the general StackExchange guidelines). Maybe (but this should be an exception rather than a rule) two closely related questions with the second question a variation of the first one. For instance: Question 1. Is it true that every topological manifold admits a triangulation? ...


4

I just found that aligned is right-aligned by default. So it could simply be done like this: $$\begin{aligned} 5+4+3+2+1\\ 4+3+2+1\\ \vdots\\ 1 \end{aligned}$$ Result: $$\begin{aligned} 5+4+3+2+1\\ 4+3+2+1\\ \vdots\\ 1 \end{aligned}$$


3

You can do it as follows: $$\begin{array}{ccccccccc}5&+&4&+&3&+&2&+&1\\ &&4&+&3&+&2&+&1\\ &&&&&&&&\vdots\\ &&&&&&&&1\end{array}$$ You will get:$$\begin{array}{ccccccccc}5&+&4&+&3&+&2&+&1\\ &&4&...


3

As Pedro has already mentioned, the best solution is to install an adblocker. Here is an article about "the best ad blockers in 2021". For what it's worth, I use uBlock Origin on Google Chrome, and it works perfectly.


2

Another implementation is by semi-manually adding the correct space with \phantom, which could be useful if it appears inside more complicated objects: \begin{align} 15 &=5+4+3+2+1\\ -5+15 &=\phantom{5+{}}4+3+2+1\\ -4-5+15 &=\phantom{5+4+{}}3+2+1\\ -3-4-5+15 &=\phantom{5+4+3+{}}2+1\\ -2-3-4-5+15 &=\phantom{5+4+3+2+{}}1\\ \end{align} code (...


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