试卷看似单纯可是心机太重
[shì juăn kàn sì dān chún kĕ shì xīn jī tài zhòng]
Translates to 'The test paper seems simple, but it's full of ulterior motives,' reflecting experiences with tricky exam questions, which are often deceptively complex. This could be used by someone who feels exams always catch them out.