The following is the Latex code for CDF of Standard Normal Distribution.
\Phi(x)=P(Z \leq x)= \frac{1}{\sqrt{2 \pi}} \int_{-\infty}^{x}\exp\left\{-\frac{u^2}{2}\right\} du.
Showing CDF of Standard Normal Distribution on WordPress
If you combine the latex above with some JavaScript and HTML, you can add it as WordPress Shortcode and show it in WordPress.
<script type="text/javascript" async="" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-MML-AM_CHTML">
</script>
<p><span class="math display">\[ \Phi(x)=P(Z \leq x)= \frac{1}{\sqrt{2 \pi}} \int_{-\infty}^{x}\exp\left\{-\frac{u^2}{2}\right\} du. \]</span></p>
The following is the final look of showing CDF of Standard Normal on WordPress.
\[ \Phi(x)=P(Z \leq x)= \frac{1}{\sqrt{2 \pi}} \int_{-\infty}^{x}\exp\left\{-\frac{u^2}{2}\right\} du. \]