Simplify.
A. 3x3 - 7x2y2 + 5xy4
B. 13
C. 3x13 - 7x12y4 + 5x11y6
D. 3x3 - 21x7y3 + 15x6y5
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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?
What will be an ideal response?
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