123456789+123456789-123456789*123456789/123456789=y
hỏi y / 123456789=?
? =
123456789-123456789-123456789+123456789=?
123456789=123456789*123456789:123456789
123456789+123456789+123456789=???
123456789+123456789=
123456789+123456789
123456789*123456789
123456789+123456789=?
123456789+123456789=