Income from self employment

Hi I gave f6 this September.. I wanted to know that if in the question it is written that one should use (0) for items which are not taxable or deductable. I just put zeros with the brackets. I just across June 2017 marking scheme and in the answers they just write 0 for items which are not taxable or deductable. Will I get marks if I write (0) instead of 0. Thanks Tomas