I cannot get rid of previous sites on my home screen Galaxy Samsung 7 tablet. Have gone to settings and requested deleting cache and previous browsing history but it is still there. HELP!!!

Delete Messages Samsung Galaxy J7 Galaxy J7

It is best to go to the Settings application on the menu and look for Fonts. Look at the options to remove the font info.

I am assuming you have galaxy 10 for which the manual link is below. If not then go to the Samsung support site and select the manual for the correct model.

http://downloadcenter.samsung.com/content/UM/201406/20140623190349654/GT-P5210_UM_EU_Kitkat_Eng_Rev.1.0_140618.pdf

Tablet Mobile Phone Support SAMSUNG Australia

Is there any particular reason to format the tablet?

I found the perfect solution to your problem here:
\http://www.mostlyblog.com/how-to-uninstalldelete-apps-from-samsung-galaxy-tab
Here is what it said:

Step 1 : From the Home screen, tap the Menu key.
Step 2 : Click Next to continue, or click the highlighted area on the tablet.
Step 3 : Now Tap Settings.
Step 4 : Now Tap Applications on Galaxy tab.
Step 5 : Tap Manage Applications
Step 6 : Tap the required application.
Step 7 : Tap Uninstall
Step 8 : Tap OK to continue.
That's it now your application from Samsung tab is removed or delete.Follow the same step to uninstall other app from tab.
Hope this helped!
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There are many methods for unlocking mobile phones, but codes are best one, because it is easy and safe also,
you can get the unlock code for your Samsung model mobile, through this site http://www.unlocking4u.com/samsung-s5230/rs6wp9/
It has the best instructions and easy methods for unlocking your Samsung model mobile phones........