Answer:
Let's simplify each of the expressions first:
-12 - 6 = -18
-3 - (-7) = -3 + 7 = 4
-3(-2) - 4(-3) = 6 + 12 = 18
Now, we can put them in order from least to greatest:
-18 < 4 < 18
Therefore, the order from least to greatest is -18, 4, 18.
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