I am using codemirror render-math(https://github.com/cben/CodeMirror-MathJax). My code:
\documentclass{???????} %% please complete
\usepackage{???????} %% please complete and add all packages related to your problem
\begin{document}
\begin{equation}
e^{\pi i} + 1 = 0
\end{equation}
%%% this is rendered
\begin{equation}
a + b + c + d + \int_a^b f(x)dx - \sum_k c_k\int g(x)dx
= \prod_n \int_{\Omega_k} F(x,y,z) d\omega
\end{equation}
\end{document}
Only the second equation is rendered. How can I import packages for this problem?

\documentclass{...}, the required\usepackage's,\begin{document}, and\end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. – Philipp Imhof Apr 29 '20 at 07:58