小明不死数学难亡数学不死小明不亡
[xiăo míng bù sĭ shù xué nán wáng shù xué bù sĭ xiăo míng bù wáng]
This playful username suggests a battle between 'Xiaoming' and math. It expresses that 'as long as Xiaoming isn't killed by the difficulty of math, he will never give up on math'. It's often used in contexts where Xiaoming (a generic name for a student) has a particularly difficult time studying mathematics.