I am having some trouble with these questions

1) Find d²y/dx²

e^3y+x=5y

2a) Use implicit differentiation to find the derivative dy/dx.

b) Find the slope of the curve at the given point.

6xy+2x^3/2y^1/2=108; (9,1)

3) Find an equation of the line tangent to the following equation at point x=1.

y=x^tanx

4) Compute the derivative. Use logarithmic differentiation where appropriate

d/dx(1+7/x)²

5) Find the higher order derivative

d³/dx³(x² ln 4x)