$\"\"$

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Let the complex numbers are $\"\"$ and

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$\"\"$ , then the product of two complex numbers is

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$\"\"$ .

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The multiplication of the complex numbers is

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$\"\"$ .

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Let the complex numbers are $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The result is $\"\"$ .