I'm going to give this my best shot at it.
\((3-\sqrt5)(4+2*\sqrt5)(1+\sqrt5)\)
\(\left(2+2\sqrt{5}\right)\left(1+\sqrt{5}\right)\)
\(2\cdot \:1+2\sqrt{5}+2\sqrt{5}\cdot \:1+2\sqrt{5}\sqrt{5}\)
\(12+4\sqrt{5}\)
Someone plz tell me if I am wrong!
Have a nice day guest!