Add.(-7 + 3x6 + 5x4) + (5x6 + 5x4 - 2)
A. -2x6 + 8x4 + 3
B. 8 + 10x6 - 9x4
C. 8x6 + 10x4 - 9
D. 9x10
Answer: C
Mathematics
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C. 
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