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Calculeaza, respectand ordinea efectuarii operatiilor:324+8×9= ,412+9×9= ,7×6+521= ,7×7+514= ,659-6×8= ,162-9×4= ,3×8+198= ,5×7+699= ,654+5×2×7= ,174+3×3×6= ,384-1×9×5= ,451-2×4×8=