Get your Adsense code from the Adsense website
Parse the code to replace special characters with HTML entities
In Blogger, go to Layout, then choose Edit HTML
Make a backup of your template by clicking Download Full Template
Click Expand Widget Templates
Search for < data:post.body/ > or
< p > < data:post.body/ >< /p >
Place your Adsense code on the line immediately above this
Save the template

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