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Efectuati:
21^2-2*{11^2+21:(2-1)+2*[1+2^3*(1+2)+2^4-2^1]}
HELL! !!
Dau coroana!!!


Răspuns :

=441-2[121+21+2(1+8*3+16-2)]=
=441-2(142+2*39)=
=441-2*220=
=441-440=
=1