Hi again. I have a few problems that I would like looked over please. The double parentheses are the very large parentheses. My answers are annotated inboldnumbers. Red numbers are exponents.

Problem 1: ((3 a2 b c-1))-2

....................9 a-1 b-1 c

(3)-2 (a2)-2 (b)-2 (c-1)-2

(9)-2 (a-1)-2 (b-1)-2 (c)-2

-9 a4 b2 c2

-81 a2 b2 c2

9 c4

a6b4

_______

Problem 2: x-2a +6 = x3(a-3)

-2a + 6 = 3a – 9

-2a – 3a = 9 – 6

-1a=3

- 1... -1

a = -3

________

Problem 3: (The asterisk is the multiplication sign): y5a – 6 * y2-a = ya+8

5a-6 * 2-a = a+8

5a – 12-a = a+8

5a – a -12= a+8

4a – 12 = a+8

4a + a = 8+12

5a = 20

5......5

a = 4

________

Problem 4:

3 c5 d3

6 c3 d5

c2 d2

...2

________

Problem 5:

-24 a b3

..8 a b2

-3b

________

Problem 6:

48 x2 y3

16 x y z2

3xy2

..z2

Thank you.