Everything Mathematics.

I think I'm getting sick at the busiest time of my 18teen year old life.

You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself. That is something you have charge of. You don't have charge of the constellations, but you do have charge of whether you read, develop new skills, and take new classes.” --Jim Rohn

I need a change for all that I cannot possibly change.
For my medals and my tutorials, 加油咯！

"Those who cannot remember the past are condemned to repeat it. " - George Santayana