Ex 3 vă rog cat de repede puteti !

Răspuns:
2^3+[(2^3)^7-(2^7)^3+3•3^4-81]:{3^2•[301-10•(24+2^73:2^72•3)]} =
8+(2^21-2^21+3•81-81]:{9•[301-10•(24+2•3)]} =
8+(0+243-81):[9•(301-300)] =
8+162:9=
8+18=26