I dun understand

I dun understand why Chemistry, Biology, Physics is so hard

I dun understand y going up the hill is so hard.

I dun understand why finishing 12 periods of sci subject in scol in a week is so hard..

I dun understand Integration

I dun understand physics F4, chap 2

I dun understand Chemistry F4, chap 8

I dun understand y does dis goes wrong

I dun understand her !!

Eh !!! I dun understand you lar!