2+6-(1+2)
2x+6x-(x+x)
3(x+6y)-(x-3y)
(2a+b-c)-(a+5b+6c)+10
(6a-3b+2c)-(4a+5a-2c)+4b
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2+6-(1+2)
2x+6x-(x+x)
3(x+6y)-(x-3y)
(2a+b-c)-(a+5b+6c)+10
(6a-3b+2c)-(4a+5a-2c)+4b
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Answer:
5
6x
2x+21y
a-4b-7c+10
-3a+b+4c