1-(2a-1)-(3a+3)
问题描述：
1-(2a-1)-(3a+3)
a-(5a-3b)+(2b+a)
-3(2s-5)+6s
3(-ab-2a)-(3a-b)
14(abc-2a)+3(6a-2abc)
3(xy-2z)+(-xy+3z)
-4(pq+pr)+(4pq+pr)
答
1-2a+1-3a+3=5-5a
a-5a+3b+2b+a=5b-3a
-6s+15+6s=15
-3ab-6a-3a+b=-3ab-9a+b
14abc-28a+18a-6abc=8abc-10a
3xy-6z+xy+3z=4xy-3z
-4pq-4pr+4pq+pr=-3pr