Question 1157063
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ZERO.


Find all the similar opposite terms, that cancel each other.



Ha-ha-ha.   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// &nbsp;&nbsp;It is &nbsp;<U>WELL-KNOWN joke problem</U> . . . 



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Do not calculate any sums; otherwise, people will laugh on you.