PART E
①《30年間皮膚切開だけ》
②《確かに矢取してないよね……》
VOCAB:
❶
＊30年間（さんじゅうねんかん）： Thirty years (timespan)
＊皮膚（ひふ）：skin
＊切開（せっかい）：incision
＊だけ：particle implying “only”
❷
＊確かに（たしかに）：certainly (たしか＋に＝making it an Adverb)
＊失敗（しっぱい）：failure → 失敗する： to mess up.
＊してない：（していません）：When talking, the い of いない or いません is often not emphasized / slurred. Meaning: Not doing something.
＊よ：Particle emphasizing the sentence’s meaning (?)
＊ね：Particle implying that the colleague will agree with his statement.
WHOLE SENTENCE:
① “(He) only (did) skin incisions for thirty years.”
② “(He’s) certainly not messing up (doing that).”
I am not sure about the second sentence so please help me. 
Thanks to @Myria for the correction!