The Singing Hedgehog Guide to:
BIDMAS 3
Here is an easier example:

4 + 2 x (6 - 3)

brackets first:   
4 + 2 x 3        notice we don't put a bracket around the 3

multiply next:    
4 + 6             there are no indices so we don't do them!

finally add:        10                 
again, no division so don't divide!

the standard mistake here is to do 4 + 2 first - so wrong!!!


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