What is 9x99x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x99x9x9x9x9x9x9x9x99x9x9x9x9x9x9x9x9x9x9x9 plus 875689379684378679-65876784x76589768597897896789597093 plus 5465875758767548679589x0 plus 1?

Answer 1

Assuming the "xx" is a typo, I don't think the answer is 1. Without parentheses to indicate which functions should be performed before others, in the string you would do the multiplication first, then the addition and subtraction. The "x0" would only give you "0" for the part that reads "5465875758767548679589x0" - not the entire listing.

According to order of operations conventions, you would have (9x99x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x99x9x9x9x9x9x9x9x99x9x9x9x9x9x9x9x9x9x9x9)+875689379684378679-(65876784x76589768597897896789597093)+(5465875758767548679589x0)+1 = 2.18592785×10⁴⁰

Answer 2

The symbol "xx" between the first and second 9s is an invalid operator. Therefore the calculation yields "ERROR"+ 875689379684378679 - 65876784x76589768597897896789597093 + 5465875758767548679589x0 + 1 which equals ERROR