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Scrieti rezultatul
{[84-(36+31)+4]-[56+(19+28-44)-39]+11}-12
=

{862-[486-(204-187)+919-841]-(819-276-415)}-38

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Răspuns :

{[84-(36+31)+4]-[56+(19+28-44)-39]+11}-12=
=[(84-67+4)-(56+3-39)+11]-12=
=(21-20+11)-12=
=(1+11)-12=
=12-12=0

{862-[486-(204-187)+919-841]-(819-276-415)}-38 =
(204-187)=17
919-841=78
(819-276-415)=128
{862-[486-17+78]-128)}-38 =
=[
862-(486-17+78)-128]-38 =
=(862-547-128)-38 =
=187-38 =149