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1). 8n-(n-3)
8n-n+3
7n+3
2). 20u-6(u+5)
20u-6u-30
14u-30
3).-w+4-(3w-13)
-w+4-3w+13
-4w+17
4). p-5(2-3p)+1
p-10+15p+1
16p-9