Just double checking.
Killing a Greedent (for example) yields 2 EVs in HP. Pokerus doubles EV gain. Power Items let you gain an extra 8 EVs.
With Pokerus and Power Item (in this case, the Power Weight), killing a Greedent yields:
(2 + 8) x 2 -- making it 20 EVs per Greedent?
Or is it...
(2 x 2) + 8 -- making it 12 EVs per Greedent?
Or am I wrong on both accounts because my brain hates math?
I barely graduated high-school, don't judge me ¯/(ツ)/¯