1. y=sqrt(ax+b)

dy/dx = (a)/(2*(root(ax+b))

this is according to the chain rule.

2. y=ln(2x+3)

dy/dx=(2)/(2x+3)

this is also according to the chain rule of differentiation.

3. y=e^(2x+3)

when we apply chain rule of differentiation in this, we get:

dy/dx=(2)*(e^(2x+3))

Hope I have answered your question. All the best!