What to do if I made a purchase but never received my license code?

If you have made a purchase but never received your license code, most likely the email with the license code either has got stuck in spam, or more likely, there was a typo in the email address you entered when making the purchase.

The fastest way to recover your license code is emailing help+manuscripts@paddle.com (the purchasing support for our payment and licensing provider Paddle) from the email address you'd like associated with your purchase, forwarding either the PayPal payment receipt for your purchase, or the last four digits of the card you used when making the purchase.

Thank you for supporting our work with your purchase!

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Multiline Equations

I have tried to insert multiline equations with Manuscript App but so far I have not succeeded.

In LaTeX this is very easy and would look somewhat like this

\begin{eqnarray} u_i &=& \sum_j\alpha_{ij}^{(l)}\cdot y_j^{(l-1)}+b_i^{(l)} \\ y^{(l)}_i &=& f(u_i) \end{eqnarray}

which looks like this:

how can I do this in manuscript app?

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