I want to write the following in one line 

```
\documentclass{article}
\usepackage{amsmath}
\begin{document}

 $\left |\hspace{0.1cm}\int \limits_{\Omega_1 \times \Omega_2 \times \cdots \times \Omega_{n-1}}\left|\int_{\Omega_n}\overline{f_{x_1, \cdots ,x_{n-1}}}e_{nj_n}\,d{\mu_n}\right|^2\,d{(\mu_1 \times \cdots \times \mu_{n-1})}\right|\leq\left|\hspace{0.1cm}\int \limits_{\Omega_1 \times \Omega_2 \times \cdots \times \Omega_{n-1}} \int_{\Omega_n}\left( \overline{f_{x_1, \cdots ,x_{n-1}}}\right)^2. 1\,d{\mu_n}\,d{(\mu_1 \times \cdots \times \mu_{n-1})}\right|$

\end{document}

```

Is there any way?