Answer:
If you meant 3 [ ( 15-3 ) 2 ] + 4, the answer should be 73.
Explanation:
3 [ ( 15-3 ) 2 ] + 4
= 3 [ ( 12 ) 2 ] + 4
= 3 [ 24 ] + 4
= 69 + 4
= 73
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