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= (棵)
30+7=
45-5=
30+40=
80-30=
40+24=
53-20=
25+3=
36-5=
58+9=
62-8=
8+62=
90-7=
26+5=
42-6=
48+7=
32-7=
65+30=
65+3=
53+4=
53+8=
46+4=
46+7=
82-20=
82-2=
47+=55
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