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-3-(8-15)+(-8-3)-[7-(-13-9)]

Răspuns :

-3-(8-15)+(-8-3)-[7-(-13-9)]=
-3-(-7)+(-11)-[7+22]=
-3+7-11-29=
4-11-29=-7-29=-36
= -3-(-7)+(-11)-[7-(-22)]= -3+7-11-(7+22)=4-11-29=-7-29=-36