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