How to say simple math operations??? Hello everyone! I need to know which are the most common (just how teachers say at school) ways to say the following math expressions in english: 3x4=12 (is it 3 per 4?? or i can say 3 dot 4? 4^2=16 25/5=5 (i think this is 25 over 5) By the way, i have a question related with classes and exams: A student: - Takes a class?? - Takes or give an exam?? A professor: - Give sa class?? - Takes an exam?? Which are the most common and correct ways to say that? Thank you so much!