Not difficult. In China, math is average, and people who are serious at school should go there and listen carefully. If they don't understand, ask the teacher. It is easy to pass. The premise is that you must work hard. As far as I know, matriculation mathematics at the University of Sydney is not difficult. It is not difficult for science girls who failed in the college entrance examination to study preparatory mathematics.

So you have to refuel, play less and lose less, and be fluent in math. Good luck, remember to adopt ~ ~ ~