
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: $x=2+\sqrt{2}$, $y=2-\sqrt{2}$.

(1) Find the value of the algebraic expression: $x^{2}+3xy+y^{2}$.

(2) If the lengths of the diagonals of a rhombus are $x$ and $y$, find the area of the rhombus.

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