I currently have the following markup to render aligned equations:

```
\[
\begin{split}
\sum_{j=1}^{n+1} j \cdot j! &= \overbrace{(n+1)!-1}^{A(n)} + (n+1) \cdot (n+1)! \\
&= ((n+1)+1) \cdot (n+1)! - 1 \\
&= (n+2) \cdot (n+1)! - 1 \\
&= (n+2)!-1
\end{split}
\]
```

It seems like the summation is creating an awkward non-uniform space between the first and second lines:

I understand why it's happening, but is there a way to prevent this from happening and reduce the spacing between the first and second lines?

## Best Answer

We can use

`\smash`

to get rid of the excess space completely, and it doesn't involve any tweaking of lengths by eye.The result may or may not be to your taste though.