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
 
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