If you do not do formal homework this will be noted in maths department records and you will be automatically referred to the Principal Teacher of Mathematics who will take appropriate action.
Teachers constantly monitor the completion of informal homework. Not completing homework is likely to lead to disciplinary action. If you get stuck, try your best and write down what you can. Tell your teacher the next time the class meets that you had difficulties and they will arrange help for you.
Everyone has busy lives … make your homework a priority – it will help you learn to meet deadlines, and will also improve your maths skills.