While studying for accounting:

Office equipment: 13.00
Less: Accumulated depreciation - office equipment: 6.00

naanima's dominant brain: 13 - 6... hmm, 6+13, depreciaiton of office equipment for adjusting entries and...
naanima's fangirly brain: zechs + trieze = sex on office desk.
naanima's dominant and fangirly brain: Need 6+13 fanfiction.

methinks it is time to sleep.