학창 시절 수학 공부 경험과 좌절감 표현

geuraeseo

So,

jung hakgyo imi han 2haknyeon jeongdo-ui gwajeong-eul

I had already mastered about the second-year middle school curriculum.

imi da maseuteo-reul hago

I had already mastered it,

jung hakgyo-e iphakhaessgeodeunyo

and then I entered middle school.

geuraeseo jung hakgyo cheoeum moigosa-reul bwasneunde

So, when I took my first mock exam in middle school,

100jeon manpumyeon 61jeom-eul badasseoyo

I got 61 out of 100.

eo? jung2 gwajeongkkaji maseuteo-reul haessneunde... 61jeom-eul badasseoyo?...

Huh? I mastered up to the second year level... and I got 61?

2nyeon-eul junbihaessneunde

I prepared for two years,

jega gaeinjeog-eulo

and personally,

doege keun

I felt really disappointed

silpang-gwa jeolmang-gam gateun geosdeuri deuldeoragoyo

and a sense of despair.