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2014-04-11T13:10:32-03:00
S=3-7*0
s=3

s=3-7*1
s=3-7
s=-4

s=3-7*2
s=3-14
s=-11

s=3-7*3
s=3-21
s=-18

s=3-7*4
s=3-28
s=-25

s=3-7*5
s=3-35
s=-32
2 4 2