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RosaLifeShare
all the difficult math question
癞皮狗旺旺
difficult maths problems / a difficult maths problem
云片儿糕
如果是普通问题,就用question,如果是难倒了诸多大神的难题,则用 problem
迟到的春风
All the difficult maths problem
优优来来
math problems
颂美装饰
Math problems
一口好锅
a mathematical problem / a maths problem / a math problem / a mathematics problem 这四个都是正确的表达
三生皆缘
maths problem
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