First of all, this is just like the problem below (see source). With this in mind, multiply the huge number times 'a' by the terms within parentheses using the distributive property. Using scientific notation (because the numbers are so large) we obtain negative 4.110740058773269 x 10^27 az + 5.285237218422774 x 10^27 a (just from using the distributive property. The entire answer look as such (doing nothing to the first term and nothing else in general because there are no 'like terms' to combine) =02574857892457027458759 - 4.110740058773269 x 10^27az + 5.285237218422774 x 10^27a. One note, the reason it is subtraction as opposed to addition is because we do not write two signs next to each other, essentially, + - is actually '+' times '-' which is '-' which yields a '-'.