1) y = (2x² + 5x - 4)⁹
y' = 9(2x² + 5x - 4)⁸ * (2x² + 5x - 4)' = 9(2x² + 5x - 4)⁸ * (4x + 5) =
= 9(4x + 5)(2x² + 5x - 4)⁸
3) y = Sin3x
y' = Cos3x * (3x )' = 3Cos3x
4) y = Cos⁷x
y' = 7Cos⁶x * (Cosx)' = - 7Cos⁶xSinx
9)y = Sin²(3x + 5)
y'= 2Sin(3x+5)*(Sin(3x + 5))' = 2Sin(3x + 5)Cos(3x + 5)*(3x + 5)' =
= 6Sin(3x + 5)Cos(3x + 5) = 3Sin(6x + 10)