To avoid confusion from where to start the calculation from, you have to follow the BODMAS

B = Bracket first

O = Orders ( Powers and Square roots )

DM = Division and Multiplication

AS = Addition and Subtraction

Once you have done with B or O, then proceed from left to right doing any “D” or “M” as it is given in the problem, and then proceed from left to right doing any “A” or “S” as given in the problem.