Please answer a , b

Zack's work simplifying some exponents is below. Box_a. Circle or highlight at least 2 "different mistakes in Zack's work. b. Explain the mistakes and what key ideas Zack misunderstood. "Try to find mistakes caused by different ideas, not the same mistake with new shoes. N ( ba 3 ( 12 1# 83 ) ( 6A3 B 7 ) -2 ( 12 4 4 B3) ( 2A4B) 3 3 AGBY . GAB Even for the first 12 A" B 3. 8ABB3 second step mistake Zach did 3- 6. A. A. B . 1 he still hasn't was he evenly distribute 12- 8-A4.A12. B3. B3 distribute wrong his exponents way 18 AtBY because the second 96 ANG BY when you dstirbute the mistake wa It should that he did