[Pre-BB] MapleStory Formula Compilation

the description for this code is confusing...

Weapon Defense - credit to AGF/Stereo
MAX damage = (MAX before defense) * (1 - 0.01*D) - WDEF*.5
MIN damage = (MIN before defense) * (1 - 0.01*D) - WDEF*.6
where D is (monster level - player level) if (monster level) > (player level), and 0 otherwise.


what does it mean by (MAX before defense) and (MIN before defense)

where are these 2 values obtain from?


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is there any formula for avoidability?
like how to not get hit by monster if your character has X amount of avoidability and monster have X amount of accuracy?