\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
f(x) = x^2
\end{equation*}
\end{document}
When I type this in MikTex I always get an error and cannot see the Typeset. Why?
I always get this

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
f(x) = x^2
\end{equation*}
\end{document}
When I type this in MikTex I always get an error and cannot see the Typeset. Why?
I always get this

equation*environment (and in all other math environments). – egreg May 03 '16 at 18:59