I am so hopeless

Today, i had a Amths test. And you know what, i dunno how to do. And it's because that i had forgotten one of the formula. SUCKS! Because of that, i lose about 12 marks. Die le. I'm prepared to do the review questions and might be the only person whom failed the test. HAishx. So embarrassed. Haishx. I had a quarrel with my friend just now. Feeling kind of irritated now. So, i am going to end the post by saying "goodbye"...