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The equation is $\"\"$ .

Rearrange the terms.

$\"\"$ .

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Reduce the above equation into the standard form of conic.

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Divide each side by 4.

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The reduced function resembles the standard form of ellipsoid $\"\"$ , where $\"\"$ and $\"\"$ .

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Standard form of the equation is $\"\"$ .

The surface resembles ellipsoid.