How to put a formula / equation into a text (not separate from the text and not centered)

Question

How to put a formula into a text (not centralized)?
I only know how to use \[...\] that places the formulas centralized, out of text.

If you are very new to TeX then you can decide if LaTeX is best practice how to use TeX. There are another possibilities: ConTeXt, OpTeX, plain TeX. — wipet, Mar 11 '21 at 05:18

Dr. Manuel Kuehner · Answer 1 · 2021-03-11T14:37:10.590

It seems like you are very new to LaTeX.
I strongly suggest that you read an introduction in LaTeX rather than googling bit by bit, see What are good learning resources for a LaTeX beginner?.
Overleaf has a good enough introduction to mathematical expressions, see https://www.overleaf.com/learn/latex/mathematical_expressions.
Personally, I recommend reading a recent book about LaTeX when you are starting using LaTeX.
Regarding your question, what you are asking for is called inline mode and can be achieved by using the $ command, as in Normal text $a^2+b^2=c^2$ more normal text.
The other mode is called display mode (you called it "out of text").

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