
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
Given an algorithm:
```
Read    x  
If   x ≤ 0, Then  
      f(x) ← 4x  
Else  
      f(x) ← 2x  
End If  
Print, f(x)  
```
According to the above algorithm, calculate the value of $f(-1) + f(2)$.

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