precalculus questionss please write out for me

Graph the following_y=-(x+2)^2-1

Compute the Inverse of: f(x)=x+19/3

Simplify: (x-1/x^2)/(x-1/x^3), x=0,-1,1

Solve for x: 4sin^2(x)+2sin(x)=0

Graph: y=3cos(1/2x+pi/6) in detail showing pertinent points