Sir mai B. Sc. Ka math nahi samjh pata hu uske liye kya karu
There is no shortcut or alternative in studies.You will have to study hard no matter what. And its necessary to pass in all subject so you cant just ignore maths.To make it easy I would say give more and more time to maths and try to understand it as much as possible.Give more time to maths in comparison to other subjects.If the issue persists then take a tution for that and do smart as well as hard study.
Goodluck