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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.
400 + 86
86 !
The answer is 1166.
it equals 28
-86
Pi plus 86 equals 89.14
127
it is 91
7 + 21 + 2 + 86 + 4 = 120
8 + 6 = 14 and 40 + 80 = 120. So therefore 48 + 86 = 14 + 120 which is 134
14 + 14 = 28