Find the value of 755 - [250 + {33 - (100 - 70)}]

Given:​

755 - [250 + {33 - (100 - 70)}] 

Concept Used: 

BODMAS rule:

​$$\begin{array}{|c|c|} \hline \textbf{Operation preference wise} & \textbf{Symbol} \\ \hline \text{ Brackets} &[],{}, () \\ \hline\text{ Orders, of} & ² (power), √ (root) , of \\ \hline \text{Division} & ÷ \\ \hline\text{ Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\ \hline \end{array}$$ 

Solution: 

= 755 - [250 + {33 - (100 - 70)}] 

=  755 - [250 + {33 - 30}] 

=  755 - [250 + 3] 

=  755 - [253] 

=  502 ​​