
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
Calculate the circulation of the vector field given in spherical coordinates: \( \mathbf{F} = (2r) \mathbf{e}_{r} + (R + r) \sin \theta \mathbf{e}_{\varphi} \) along the circle \( L: \{ r = R, \theta = \frac{\pi}{2} \} \) in the positive direction of the angle \(\varphi\), directly and using Stokes' theorem.

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