1)8xy
2)a-a+8+12+a=a+20
3)-3c+15+6c+18=3c+33=3(c+11)
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1)8xy
2)a-a+8+12+a=a+20
3)-3c+15+6c+18=3c+33=3(c+11)
2) a-a+8+12+a
20+a
3) -3(c-5-2(c+3))
-3(c-5-2c-6)
-3(-c-11)