The advantage to read difficult poems is that you appreciate more the easier ones, like this haiku written by Matsuo Bashô :
様々の
事思い出す
桜かな
samazama no
koto omoidasu
sakura kana
They make me remember
so many different things,
the cherry flowers…
Winter is slowly arriving at its end… just a few weeks to wait before the full bloom of the cherry trees 
If anyone can help with the poem 83 I would really appreciate it, I am not totally sure about my understanding of it and still don’t see the origin of that strange あへぬ 