$\"\"$

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The expression is $\"\"$ .

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Product formula of complex numbers:

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The complex numbers $\"\"$ 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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Convert the polar form to rectangular form.

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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The polar form of the product is $\"\"$

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The rectangular form of the product is $\"\"$ .