BODMAS Rule

This rule depicts the correct sequence in which the operations are to be executed, so as to find out the value of given expression.

Here B - Bracket,
O - of,
D - Division,
M - Multiplication,
A - Addition and
S - Subtraction

So as per rule
First we should remove brackets
Second we must solve "of"
Then, Division
Then, Multiplication
Then, Addition,
Then, Subtraction

Please consider them strictly in order. Very basic yet very important formula. We need it in solving variety of questions in quantitative aptitude. So please be sure you are fully aware of What is bodmas and how to implement it.