
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Let t(x) has domain \{-2, -1, 0, 1\} and range \{-4, -2, 0, 2\}. Let u(x) has domain \{0, 1, 2, 3\} and is defined by u(x) = x - 1. What is the sum of all possible values of u(t(x))?

Present the answer in LaTex format: \boxed{Your answer}
user