I've tried variations of \frac{$\pi$}{2} without any success, while \frac seems happy to accept numbers and/English letters.
Any advice would be greatly appreciated by this newbie.

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Code: Select all
\documentclass{article}
\usepackage{amsmath}
\begin{document}
text text $\frac{\pi}{2}$ text text text text $\dfrac{\pi}{2}$ text text text text text text
\[
\frac{\pi}{2}
\]
text text text text
\begin{equation}
\frac{\pi}{2}
\end{equation}
\end{document}
NEW: TikZ book now 40% off at Amazon.com for a short time.
And: Currently, Packt sells ebooks for $4.99 each if you buy 5 of their over 1000 ebooks. If you choose only a single one, $9.99. How about combining 3 LaTeX books with Python, gnuplot, mathplotlib, Matlab, ChatGPT or other AI books? Epub and PDF. Bundle (3 books, add more for higher discount): https://packt.link/MDH5p