If trinitarians are true monotheists, why do they speak of "God the Father" + "God the Son" + "God the Holy Spirit"? One "God" plus another "God" plus still another "God" within "God" = 3 "Gods" in 1 "God," not 3 "Persons" in 1 "God." As meaningless as such gibberish and gobbledygook is to intelligent people seeking truth, trinitarians defend it.
Trinitarians do not think of 3 separate Gods (which 1 + 1 + 1 would be). Try this: 1 x 1 x 1 = .....1! This gives us the full volume of God...One God, 3 persons.