てやってもらえるか => Could you please... help me? N4
Suggestion
てやってもらえないか => Could you...help me, please? N3
Suggestion
やなんか => Something like... N3
Vague
さえ/にさえ/でさえ => Even N3
Not only, Not even
~やむをえず  => unavoidable, no other way to do something N2
Necessity, obligation
んで => Because... N4
Cause, reason
~いかんだ / いかんで、~ /  ~いかんによって、~ => It depends ... N1
Related, corresponding
どうやって => how N5
さえ/でさえ => even; so much as; not even N3
させてください/させてもらえますか/させてもらえませんか => please let me do N3
あえて => dare to N2
Suggestion
てやる => Do for someone N4
Give and take advice