3.141592654-+0.000000000410207=3.141592654
why?
r this 0.0000...means zero?
3.141592654
0.000000000410207 + or -
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3.1415926544 10207 - This is the accurate answer if you add them together.
3.1415926535 89793- This is the accurate answer if you subtract them from each other.