89-37= 51-39= 52-27= 63+37= 62+19= 47+19=
63-27= 61-26= 48+23= 57-48= 42-17= 86-54=
54+28= 27+36= 48+23=57-48=54+29=42-17=
86-54=54+28=27+36=65-36=54-45= 35+27=
84-48=40-29=48+48=60+25= 72-45= 46-38=
56-28=78-69=72-37= 53+28=96-59= 75+17=
54+37= 59+19=55-47= 73+29=
56-27= 92-59=
12+29-19=69+10-36= 27+12-28= 67+27-37=72-54+12=
35+12-28=62-18+24= 53-29+19= 12+79-62=75-24+26=
本文來源：http://www.nvnqwx.com/shiti/767431.htm