a) -2+{-1+[5-3 x 11 :3]-35]

-2+{-1+[5-33:3]-35}

-2+{-1+[5-11]-35}

-2+{-1+[-6]-35}

-2+{-1-6-35}

-2+{-42}

-2-42= -44

b) -5-[3 x (7-8)-22 : 11]

-5-[3 x (-1) -22 :11]

-5-[-3 - 22 : 11]

-5-[ -3 -2]

-5-[-5]

-5+5= 0

c) 2- (50+ 6)- 5 x 20 : (-4)

2-(+56) - 5 x (-5)

2-56+25

27-56=29

d) 3- {30: 5 -[-7 x (+3) + 3] :6}

3-{30: 5 -{-7 x 3 +3]: 6}

3-{30: 5 -{-21+3]: 6}

3-{30: 5 -{ -18]: 6}

3-{30 : 5 +18 : 6}

3- {6 + 3}

3-{+9}

3-9= -6

Espero ter ajudado. Se tiver errado desculpa.

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