"To simplify the calculations" means to make the math or problem-solving process easier or more understandable by using methods or strategies that reduce complexity. Full definition
I have simplified the calculation in the below chart which you can understand clearly. (moneygyaan.com)
Please let me know whether or not you agree with the above simplified calculation and, if not, why not. (judithcurry.com)
It welcomed HMRC's proposal not to introduce retrospective anti-fragmentation rules to old trusts, and to simplify the calculation of trust charges on old trusts. (newlawjournal.co.uk)