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400-5{32-(-2)[16-2-(-2)^4]}-(-20)^2


^=inseamna ridicare la putere


Răspuns :

400-5{32-(-2)[16-2-(-2)⁴]}-(-20)²=
=
400-5{32+2[16-2-16]}-400=
=-5{32+2(-2)}=
=-5(32-4)=
=-5×28=
=-140