[email] How to create SPF record for multiple IPs?

I do not find any guidelines regarding how to configure multiple IPs into an SPF record. So far I used (for example):

v=spf1 ip4: a mx ?all

But now I should add another range of IPs that are allowed, e.g.

v=spf1 ip4: ip4: a mx ?all

Is the second syntax correct? Thanks.

This question is related to email spf

The answer is

The open SPF wizard from the previous answer is no longer available, neither the one from Microsoft.

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