I need help on the stared ones( I WILL MAKE YOU BRAINIEST)!

Answer:
Step-by-step explanation:
bottom left is 13a + 2b
bottom right is 15y - 6
Answer:
1) 13a + 2b
2) 15y² - 6
Step-by-step explanation:
3a + 2(b + 5a)
3a + 2b + 10a
13a + 2b
3y² + 3(4y² - 2)
3y² + 12y² - 6
15y² - 6