only assignment call ,incerement decrement can be used as a statement

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ASP.NET

i want to use below script in my code but the only assignment..can be usedas a statement error occur
the code the use in cs page is below

  <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- New2 -->
<ins class="adsbygoogle">
     style="display:inline-block;width:728px;height:15px"
     data-ad-client="ca-pub-9998221799602262"
     data-ad-slot="3940465902"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>``a