ARGH.....

OMG!!!
i did something very very stupid and careless in my night exam yesterday...
at first i did the whole thing correctly and completed the whole thing already.
Then, i look at the clock and check back my work... *tink* i thought that the lecturer might prefer to see my answer in another form for question 1a.
I took up my eraser, erase the whole answer for 1a and redo it to be in another form.
okay, i'm done...
At night when i went to bed, i think think think.... OMG !!!! i shouldn't have erase because it shouldn't be in that form or else it'll be wrong !
Really really feel like shouting out !!! arrgh !!!!

just hope that my "A" won't fly away. =(