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10 questions
7x +9y+4x
20xy
11x+9y
11x+9xy
13xy
-2k+3k-(-5k)+6k
3k
-4
13
-13
K-I+K+I
-2I
2K-2I
2K
0
5x+2a-4d
3adx
5x-2ad
11+5x+x
11-6x
17x
11+6x
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