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5+5×{5+5×[5×5×(5-5)]}+5÷5=31
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Răspuns :

5+5×{5+5×[5×5×(5-5)]}+5÷5=31

5+5x[5+5x(5x5x0)]+1=31

5+5x(5+5x0)+1=31

5+5x5+1=31

5+25+1=31

30+1+31

31=31