1234567+12345678+12345678+123456789+123456789+23456789+9876543+6543234567890+234567898765434567
12345678 x 11=???????????? 12345678:11=???????????????
12345678+1234566789=
8891284+12345678
123456789+-12345678=?
12345678:54=???
12345678+87654321=????????
12345678:34=?
2345678+12345678