
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
Suppose $d \neq 0$. Calculate the sum $\left(15d^3 + 12d + 7 + 18d^2\right) + \left(2d^3 + d - 6 + 3d^2\right)$ in the form $ed^3 + ad + b + cd^2$, where $e$, $a$, $b$, and $c$ are integers. Find $e + a + b + c$.

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