1)
Do we find that Egypt returned after 40 years?
1.
Malbim: Yes. It was destroyed in Nebuchadnetzar's 27th year; he reigned another 18 years, and after him Evil Merudach reigned 22 years. After him, in Belshatzar's first year, the Nevu'ah of Pras was said to Daniel, and then the exiles began to return in the days of Melech Paras, and they began to gather.