Typing a word in between two aligned equations
96746
Intertext vertical spacing
27341
Making  a new environment combining equation and split
49958
How do I put big brackets under different parts of an equation to attach text labels?
42486
How can I break an align environment for a paragraph?
71244
Side comment between equation
15616
How can I split an equation over two (or more) lines
76817
Labelled in-line equation
77390
Aligning equations while using cases in align environment
130113
Align multiline equation with expression after equal sign
151939
How to align a set of multiline equations
141247
Several error in equation typing
28952
Sharing alignment between equations in two different items
77853
Equations inside enumerate aligned on item's number
84294
align* but show one equation number at the end
50117
Aligning equations - System of equations all numbered
52905
How to write the definition of each term in an equation with pointing arrows?
126287
In align environment, how can you label some (but not all) of the equations?