Question

30+{16²-56:[8²:(13-9)²+2⁴+2³]-200}:54¹
Com conta!!!

Answer 1

Boa tarde, André.

30+{16²-56:[8²:(13-9)²+2⁴+2³]-200}:54¹ = 

30+{16^2-56:[8^2:(4)^2+2^4+2^3]-200}:54^1 = 
30+{16^2-56:[8^2:16+2^4+2^3]-200}:54^1 = 
30+{16^2-56:[64:16+16+8]-200}:54^1 = 
30+{16^2-56:[4+16+8]-200}:54^1 = 
30+{16^2-56:28-200}:54^1 = 
30+{256-56:28-200}:54^1 = 
30+{256-2-200}:54^1 = 
30+{256-202}:54^1 = 
30+54:54^1 = 
30+54:54 = 
30+1 = 31

Elimina:

1) - parenteses ( ).
2) - colchetes [ ].
3) - cheves { }.

Regras dos sinais: 

+ com + = +
- com - = +
- com + = -
+ com - = -

Bons estudos! :-)