given x = 999 999 999 999 determine the exact value of x^2 - 4/ x - 2 show ALL your calculations

First, let's simplify the expression x^2 - 4/ x - 2 using the given value x = 999 999 999 999:

x^2 - 4/ x - 2
(999999999999)^2 - 4 / (999999999999) - 2
(999999999999)^2 - 4 / (999999999999) - 2
(999999999999 * 999999999999) - 4 / (999999999999) - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999999998000000000001 - 4 / 999999999999 - 2
999999