Verified Answer :

(5)(−3)−(4)(−3)−3−(3)(−3)=−15−(4)(−3)−3−(3)(−3)=−15−(−12)−3−(3)(−3)=−3−3−(3)(−3)=−6−(3)(−3)=−6−(−9)=3

The answer is six but i entered this in calculator so no work