For such case, please put the content in the Excerpt section of that page. Go to Pages > Edit Page which you have to edit > Check Screen Options on Upper Right corner and Enable Excerpt from there. After that scroll down, you will see the Excerpt filed. Add the required content for your slider. The content of the excerpt field will appear on the slider and the content you added above on the content section will be on inner pages. Check this blog post for more help. https://www.acmethemes.com/blog/2017/10/excerpt-field-wordpress/
Thank you