How can I have a indented new line in math mode?
The line after
\newindentedline should be indented and start in a new line.
\[ X \subset Y \Rightarrow \forall x \in X: x \in Y \newindentedline \Rightwarrow X \subset Y \]
You should read the mathmode document.
To allow linebreaks inside mathmode you need an environment like
For manual (or more accurate) positioning of the alignment (rather than having it line up with some content in the row above), using the following instead:
where you specify the indent as the argument to
To get a unnumbered equation you can use the