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4,25+[-1,(2)]=
-1,1(2)+4,0(2)=




Răspuns :

425/100-101/99=42075/9900-10100/9900=31975/9900=6395/1980=   1279/396
362/90-101/90=261/90=87/30=   29/15
4.25+[12/90]=25
112/99+402/99=514