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(-5 supra 3) + (-5 supra 6) + (+5 supra 2) + (-5 supra 12) help.

Răspuns :

=-5/3-5/6+5/2-5/12=
=(-20-10+30-5)/12=
=(-30+30-5)/12=
=-5/12
0supra9 +10 supra 14 = 10 supra 23