Can someone teach me. I think I did some of the first right but towards the middle and end... idek

Find the derivative of the function. 1. y = cos 3x u= 3X u = 3 y' = - 3 sin (3x) 2. y = sinxX u = itx w y = IT cos ( TIX ) ( TT) ( 1) + ( ) (0 ) y = cosu y' = - sinu y = sinu 1 = cosu 3.. y = 3tan4x y'= 12 sec (4x12 4. y = sec x2 y = 2 x sec ( x ? ) tan (x2 ) u = 4 X u = 4 y = 3tanu y' = 3 see ( u ) w = x 2 u = 2 xecx tan> y = secu y' = secu tan u 7 5. y = sin(1+2x) 2 (4' = 4sin(1+2x) cos(1+2x) 6.y = cos(1-2x) y' = 4 cos ( 1 - 2x ) sin ( 1-2x ) u = 1+ 2 x w = 2 2 w= (1 - 2x ) u' = - 2 y = ( sinu ) = y' = 2 (sinu ) (cosu ) y = cos ( u ) ? y' = 2 ( cos w ) ( - sin w ) y' = - 2 cos ( 1 - 2 x ) sin ( 1-2x ) ' 7. h(x) =sin2xcos2x ( cos 2 x ) cos 2 x . 2 8. f (x) = 4sec'x W = 2 x Y = sinusin 2x u = 2 x , 2 S in 2 x cos 2 x ) - Rcos z x sin zx w = secx u = sec x tanx Y = cosw Y = 4 u 2 u' = 2 w ' = 2 Y = 8 w y ' = cosu Y' = - sinu 2 605 2x - 2 sin 2 x f' ( x ) = 8 sec 2 x tanx 3 x ) - 5 COS ( 712 x 2 ) 9. y = 3x -5cos(xX)2 10. g (x ) = Vx +-sin(2x)? U = 12 x 2 w' = 2 x y = 5 cosu y'= 5sinu 3 x + 10x sin / T1 2x2 )