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a fost răspuns

calculeaza respectand ordinea efectuari operatilor: a)2:2+2x2-2,3+3x3+3:3-3,4x4-4:4+4b)5-5:5+5x5,6:6+6x6-6,7-7:7+7x7c)8-8:8+8x8,9:9+9x9-9,10-10:10+10x10.