Need Unification with 2 Common Input TextBoxes

As shown on the attached screenshot, a webpage of an open-source software from a vendor currently has 3 orange-framed regions with separate input textboxes for each. Plan is to (1) unify them all with just One Single Input Textbox whose entries applies to all. 2) Also, the single Input Textbox should be able to take in unlimited search terms separated by commas in between them, so user can enter unlimited search terms, say 500 search terms, so long as these are separated by commas between them. Currently, only 2 or 1 search terms can be entered into each of the Orange-framed region. Since the API is already working, just ease the constraint to enable more search terms be uploaded concurrently, in their list. 3rd and thus Last point is for the Green-framed region's textbox to be unified too, with a single textbox, whose start date and end date applies to all the 3 green-framed regions. I may share the source code with the right bidders to work on.