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{[-2^5÷2^2-81÷3^2]÷(3-20)-2^6÷(-4)^2}×3^2=

Răspuns :

{[-2^5÷2^2-81÷3^2]÷(3-20)-2^6÷(-4)^2}×3^2=
={[-2^3-3^4÷3^2]÷(-17)-2^6÷2^4}×3^2=
 
={[-8-3^2]÷(-17)-2^2}×3^2=
 =[(-8-9)÷(-17)-2^2]×3^2=
=[(-17)÷(-17)-2^2]×3^2=
=(1-2^2)×3^2=
=(1-4)×3^2=
=(-3)×3^2=
=
-3^3=-27