How do I simplify this?

(cot^2 x + 1) (sec^2 x -1)

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?