1)y' = 1/(2√x) - 8x + lnx
2) y' = 9(x⁴ + 2x) + (9x +3)*(4x³ +2)= 9x⁴ + `18x +36x⁴ +12x³ + 18x +6 =
=45x⁴ +12x³ + 36x +6
3)y'= (2*x² - 2x(2x -3))/x⁴ = (2x² -2x² +6x)/x⁴ = 6x/x⁴ = 6/x³
4)y'=-9Sin9x - 18 Sin6x*Cos6x = -9Sin9x - 9Sin12x
5)y = e⁴ˣ + log₄x = e⁴ˣ + lnx/ln4
y'= 4e⁴ˣ + 1/(xln4)