48/2(9+3) in fact is the same as 48/2*(9+3)

and to make calculating easier, you can calculate it in parts.

(9+3) has priority and will be 12

48/2 will be next since it's in the front and will be 24

which ends into 24*12 which is 288

and to make calculating easier, you can calculate it in parts.

(9+3) has priority and will be 12

48/2 will be next since it's in the front and will be 24

which ends into 24*12 which is 288