Well, I'll leave it to someone else to explain it, but I'll give you some tips to improve your obfu.

1. Use as few parentheses as possible: when you write ($&&~433)x ... you don't need those parentheses. It makes it harder to understand if you use as few parentheses as possible, I suggest you scan the precedence table while you are writing your obfu.

2. your $test:$one?$two is a little easy to understand. I would change your:

($&&~433)x$&>4?2:$&
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$&&~433x$&>4*$^F+(!$&>4*$&)
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