Autoboost help

trying to do a lengthy IF/THEN and Autoboost to set a Timeline column. I’m going cross-eyed looking at this…does anyone know if the Timeline and Add_Days are compatible? or am I just missing a )?

IF({client’s Course Request} IS “Performance Management”, TIMELINE({client’s Start Date},(ADD_DAYS({client’s Start Date},7))), IF({client’s Course Request} IS “Essentials”, TIMELINE({client’s Start Date},(ADD_DAYS({client’s Start Date}, 2)), TIMELINE ({client’s Start Date},(ADD_DAYS(TODAY(),1))))