Question 982105
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Too easy. Just add the corresponding elements

&#9474; 3&#9474;   &#9474;-5&#9474;   &#9474;-2&#9474;
&#9474;-5&#9474; + &#9474; 1&#9474; = &#9474;-4&#9474;
&#9474;-4&#9474;   &#9474; 6&#9474;   &#9474; 2&#9474;

Edwin</pre>