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calculați dau coroana

-5+7-6+3-2+4
(+5-11+3)*(+4-8+6
+3[+3*(-8+6-4)+15]+21
-3{-8-3[-2*(+4-7+5-3)*(-6+4-3)+6]}
-5+7-6+3-2+4
(+5-11+3)*(+4-8+6
+3[+3*(-8+6-4)+15]+21
-3{-8-3[-2*(+4-7+5-3)*(-6+4-3)+6]}