MA001 Unit 1.1 Question 24

Please can someone help me with Question 24 - I am unable to arrive at the given answer - even after 5 attempts. I’d like to understand what I’m doing wrong. I continually get 5 as my answer.

Numerator is:

13+(−3)squared +4(−3)+1−[−10−(−6)]

Denominator is:

{[4+5]÷[4squared−3squared(4−3)−8]}+12

My result is 5
Numerator is 15
Denominator is (-9+12) = 3
But, the book result is 3. I don’t understand why