6. Calculaţi:
a) –27 +2:{-5+3 · [(-7)+(-10) + 18] – 21} + 73 =
b) 5.-2. (4 – 9) +5. [4 + 26: (-16) +18]}:(-250) =
c) 121:{-10 + 17. [25 +3.(15 – 32)] -2.32) =
