pls solve this and show the process

9. 12a of $\frac{1}{2}$ − 6a ² $÷$ 3a + (a + a)

Dear Student,

12a of 1/2 - 6a² / 3a + ( a + a)
= 12a * 1/2 - 6a² / 3a + ( a + a)
= (12a * 1/2 ) - ( 6a² / 3a ) + 2a
= 6a - 2a + 2a
= 6a

Regards,