Pls tell fast pls.. can u answer it and win 20 points..
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7x² * 3x² + 7x² * 8y² + 4y² * 3x² + 4y² * 8y²
21x^4 + 6x²y² + 12x²y² + 32y^4
21x^4 + 18x²y² + 32y^4
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