1. Simplify: sqrt6(sqrt2/2+sqrt3)-sqrt8

2. Simplify: sqrt(72x^3)-5x sqrt(2x)
3. Simplify: (2sqrt6-sqrt3)^2
4. Simplify: 6/3+2sqrt3
5. Solve: 2-y=sqrt(y+4)

I need all of the steps.
Thanks