While comparing the equations in the align* environment using the & sign before the = sign, it is giving error "! Misplaced alignment tab character &"
69316
Why is & special outside of tabular environments?
105628
Aligned equations in LaTeX
50573
Automatic reduplication of equal sign in the beginning of broken formula
141247
Several error in equation typing
92370
missing $ inserted error for equation
38642
Not equal sign (≠) with a vertical bar
43165
Spacing after equals sign in align
10303
Difference of the \dots*
89472
How can I write multi line equations with alignment in inline math mode?
122337
"inconsistent use of tabs and spaces in indentation"
108793
Highlight an equation within an align environment
151939
How to align a set of multiline equations
104883
\overset and align environment: how to get correct alignment?
144910
Inadvertent use of = instead of ==
50117
Aligning equations - System of equations all numbered
106439
Syntax in align environment
72519
What's the difference between "==" and "=~"?