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13. Calculaţi: b) a)-52: (19-32)-2-[18+44: (-11)]; [25-24:(11-14)]-[-9+8:(27-35)]; c) (-3):(-3)* (12-3²)-2[4² +11:(-11)]; d) 10²-10:10 (15-14)" +3[5³-(-2²)³].​