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calculati,scotand factor comun 49 x 135 -49 x 27 + 49 x 11 si
2011 x 5 + 2011 x 7+ 2011 x 49 +2011 x 39


Răspuns :

la primul:
49x(135-27+11)=49x119=5831
49 (135-27+11)=
49x119=5831

2011(5+7+49+39)=
2011x100=201100