1. ${\text{( x}}^2{\text{ y − 3 y}}^2{\text{ + 5 x y}}^2{\text{ ) − ( − x}}^2{\text{ y + 3 x y}}^2{\text{ − 3 y}}^2\text{ ) = ? }$

• A. ${\text{4 x}}^2{\text{ y}}^2$
• B. ${\text{4 x}}^2{\text{ y}}^2$
• C. ${\text{4 x}}^2{\text{ y}}^2$
• D. ${\text{4 x}}^2{\text{ y}}^2$

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