The answer is -72. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
Pi plus 86 equals 89.14
-86
127
86 !
400 + 86
it is 91
7 + 21 + 2 + 86 + 4 = 120
The answer is 1166.
it equals 28
-86
14 + 14 = 28
-14