How do I do these problems?

So, We Have Two Problems To Solve:

(-3)÷((-1/3) ÷ (8-4)) ÷ (-12/5)
And
(-1/3)*2÷(7/3 * (-1))÷(-6/5)

So, Lets Do The First One:

We Know That We Need To Use Order Of Operations.
We Need To First Do:
8-4.
8 - 4 = 4.
So, We Have Now:

(-3)÷((-1/3) ÷ 4) ÷ (-12/5)
So, We Need To Now Convert 4 To An Improper Fraction.
This Becomes 4/1.
Now, We Can Divide (-1/3) By 4.
Dividing Is The Same As Multiplying By The Reciprocal.
So:
-1   1 -1
--- * --- = ---
3   4 12
So, We Now Have:

(-3)÷ (-1/12) ÷ (-12/5)
So:
3 12 36
--- * --- = --- = -36
1 -1 -1
So, We Now Have:

-36 ÷ (-12/5)

So:
-36 -5 -180
----- * ---- = ------
1 12   12

So, We Now Only Have Left to Divide:
-180 ÷ 12 = -15.

So, The Value Of The First Question Is -15.

Now For Number Two:

(-1/3)*2÷(7/3 * (-1))÷(-6/5)

So, We Use Order Of Operations.

7/3 * (-1) = -7/3

Next:

(-1/3)*2÷(-7/3)÷(-6/5)

Now, We Must Do:

-1/3 * 2.
(-1/3) * 2 = (-2/3)
So, Now We Have:

(-2/3) ÷ (-7/3) ÷ (-6/5)

Now, Begin Division.
-2 3 -6   6
--- * --- = ---- = ----
3   -7 -21 21
So:
6/21 ÷(-6/5)

Do The Final Division:

6 5 30
--- *  --- = ----
21 -6 -126

Simplify:

  30  ÷ 6 5
------ = -----
-126 ÷ 6 -21

So, Number Two Has A Value Of 5/-21.