Iran released vile kids textbooks featuring disturbing images of President Trump and asking children to solve math problems calculating how long a missile will take before striking Israel, The Post has learned. The twisted tomes, entitled “We Defend Our Iran,” were released some time last year after the regime’s humiliation in the 12-Day War and also include images of intercontinental ballistic missiles launching out of a student’s backpack and other graphic war imagery. The books, which are