Răspuns :

A).......=(-9+8)²+27-4=(-1)²+27-4=1+24-4=24

B).....=[(-2²÷2²-3²÷3²-1)×(-3⁵÷3³+1)]÷(-25+1)=

=[(-1-1-1)×(-3⁵÷3³+1)]÷(-24)=[-3(-3⁵÷3³+1)]÷(-24)=

=3(-3⁵÷3³+1)÷(-24)=-3(-3²+1)÷(-24)=-3(-9+1)÷(-24)=

-3×(-8)÷(-24)=-1

C).......= -5÷5= -1