In addition to maintain the balance of language what else is parallel structure

English and math are both very important but I believe math would be more important. You need to know math so you can manage your bills and know what you can spend and what you can't. Math is key for most things, like for example when you go to the grocery store you need to be able to add up how much you think your groceries will come to cause if you will want to know if you'll have enough money to pay for it all. Or when you pay bills you'll want to know what you have left for money and if you have enough to pay the bills you need to.