Repeating a multi-line equation

Hi, I'm working on a document that looks like this: Lots of text Multi-line equation #1 More text Multi-line equation #2 More text ... Summary of useful equations: Multi-line equation #1 Multi-line equation #2 Ideally, if I change something, I should only have to change it in one

Repeating a multi-line equation

Hi, I'm working on a document that looks like this: Lots of text Multi-line equation #1 More text Multi-line equation #2 More text ... Summary of useful equations: Multi-line equation #1 Multi-line equation #2 Ideally, if I change something, I should only have to change it in one

Repeating a multi-line equation

Hi, I'm working on a document that looks like this: Lots of text Multi-line equation #1 More text Multi-line equation #2 More text ... Summary of useful equations: Multi-line equation #1 Multi-line equation #2 Ideally, if I change something, I should only have to change it in one