Differentiation: Tangents and Normals help please

I have looked through loads of various notes and stuff and I'm sure I'm doing nothing wrong but my textbook keeps telling me I'm wrong.

Can someone help me with these two questions, very clearly showing ALL working please?

1) Find the equation of the tangent to the curve y=x[squared]+(-7/x[squared]) at the point (1, -6)

--- I keep finding the answer as "y=2x-8" but the book says "y=16x-22"

2) Find the equation of the normal to the curve y=x[squared]+(-8/[square root]x) at the point (1, -6)

--- I keep finding the answer as "x+8y-100=0" but the book says "17y+2x-212=0"

Thanks