classes: lecturer. after the 30th fraction 4 - 1 fraction 5 doubledot lecturers do not come to class to teach. curriculum. after the 30th fraction 4 - 1 fraction 5 doubledot lecturers do not come to class to teach. facility. after the 30th fraction 4 - 1 fraction 5 doubledot lecturers do not come to class to teach. general. after the 30th fraction 4 - 1 fraction 5 doubledot lecturers do not come to class to teach.