Undergraduate
Maths usually waits somewhere you're not awared, and comes across you with deja vu that drives your moving tears, even though you're not concious of her affection and partialness.
Reminisce memories
Master's degree
Maths tries to free logical thoughts objective, from the bondage of human brain, to run free like floating clouds and flowing water, even on a pale piece of paper alone.
Understand nature
Middle school
Junior middle ages has always been what I most miss though without a single photo left ever, however, whose halcyon time has been recorded by words and paintings.
Detain youth