No way, you can only make changes in the templet for the best results. Can't do it inside the post itself.
It's possible to insert adsense within your posts in Blogger. In the template code, look for - "this is what creates your post body with all the content". Insert the adsense code above this tag to place the ads between the post title and body. Insert it below this tag to place ads below the post. To wrap the post around the adsense ads, use a table and align it to the right or left as required. And use this with the <Item Page> </Item Page> tags.