6+40=45-5=6+56=30+9=29+6=
58-50=37+5=23-20=67-60=40+9=
63-30=42-2=4+90=20+67=56+10=
23-6=20+80=51+8=37-7=57+30=
72-60=68-8=90-70=7+50=20+23=
50+28=52-50=18+30=86-40=40+47=
58-3=50+38=5+43=68-5=25+40=
96-90=48+8=58-8=55-3=52+30=
47-7=66-20=70-7=77-9=32+3=
90-40=61+5=60+30=55-8=7+33=
86-20=86-40=49+3=56+3=22+50=
25+20=7+42=17+50=30+20=100-30=
6+30=88-60=7+40=94-6=38+4=
100-70=34+4=74-70=28+6=7+64=
书香门第
