I want an explanation about the rules of: Idgham mutaqaaribayn Idgham mithlayn Idgham mutajaanisayn63

Assalaam alaikum wa rahmatullah
We apologize that those lessons are hard to find.  Please use the following links:
http://www.abouttajweed.com/al-mutamaathilayn_1.htm
http://www.abouttajweed.com/al-mutamaathilayn.htm
The Two the same, the two similar, the two close, and the two far, Part 3
http://www.abouttajweed.com/al-mutamathilayn_al-mutajaanisayn_4.htm
http://www.abouttajweed.com/al-mutamaathilayn_al-mutajaanisayn_al-mutaqaaribayn5.htm
http://www.abouttajweed.com/al-mutamaathilaan_al-mutajaanisaan_al-mutaqaaribaan_6.htm