My major Is Mathematic(sciences)
Wonder why I am being rejected…
If you have a lot of required classes for your major in progress, then it may be a similar situation to this one: http://talk.collegeconfidential.com/discussion/comment/22743851/#Comment_22743851
I did finish most the required classes but one, discrete math. and I finished discrete math in whiter quarter. By the way my transfer credit, unit, is around 90
but I forget to submit ‘General Education/Breadth - College of Letters & Science’ in my portal so I wonder if that’s the reason
Does around 90 mean that you might be sightly under 90? Because 90 is a hard minimum, so that could also be why. (Although applicants can also be denied for having to many, i.e. more than 105.)
It seems as if they are responsive to inquiries, so you should probably contact Admissions and ask them directly. It may be that you can be admitted on appeal. Good luck!!
Very likely 
Explain the mistake and ask for a new review.